Maxon 72-25 & 72-30 REV. J (SEPTEMBER 2015) Installation guide

M-03-05

REV. J

SEPTEMBER 2015

72-25 & 72-30

INSTALLATION MANUAL

To nd maintenance & parts information for your 72-25 & 72-30 Liftgate, go

to www.maxonlift.com. Click the PRODUCTS, TUK-A-WAY, 72-25/30 but-

tons. Open the Maintenance Manual in the PRODUCT DOCUMENTATION

window.

TABLE OF CONTENTS

SUMMARY OF CHANGES: M-03-05, REVISION J ............................................................. 4

WARNINGS ........................................................................................................................... 5

SAFETY INSTRUCTIONS .................................................................................................... 6

NOTICE ................................................................................................................................. 6

72-25 & 72-30 LIFTGATE COMPONENTS ........................................................................... 7

PARTS BOX FOR 72-25 & 72-30 GRAVITY DOWN ............................................................. 8

PARTS BOX FOR 72-25 & 72-30 GRAVITY DOWN

(WITH ALUMINUM RETENTION RAMP) .............................................................................. 9

PARTS BOX FOR 72-25 & 72-30 POWER DOWN ............................................................. 10

PARTS BOX FOR 72-25 & 72-30 POWER DOWN

(WITH ALUMINUM RETENTION RAMP) .............................................................................11

VEHICLE REQUIREMENTS ............................................................................................... 12

STEP 1 - WELD EXTENSION PLATE TO VEHICLE .......................................................... 14

STEP 2 - WELD LIFTGATE TO VEHICLE ......................................................................... 16

STEP 3 - ATTACH OPTIONAL BATTERY BOX & FRAME TO VEHICLE

(IF EQUIPPED) ................................................................................................................... 21

STEP 4 - ADD HYDRAULIC FLUID TO RESERVOIR ........................................................ 28

STEP 5 - RUN POWER CABLE .......................................................................................... 30

STEP 6 - CONNECT POWER CABLE ................................................................................ 32

STEP 7 - CONNECT GROUND CABLE (RECOMMENDED) ............................................. 33

STEP 8 - INSTALL CONTROL SWITCH ............................................................................. 34

STEP 9 - CONNECT POWER CABLE TO BATTERY ......................................................... 37

STEP 10 - REMOVE LOCKING STRAP ............................................................................. 38

STEP 11 - FINISH WELDING LIFTGATE TO VEHICLE ..................................................... 39

STEP 12 - FLIPOVER INSTALLATION ............................................................................... 41

STEP 13 - ADJUST PLATFORM (IF REQUIRED) .............................................................. 43

STEP 14 - ADJUST SAFETY HOOK (IF REQUIRED) ........................................................ 45

STEP 15 - WELD ON LOCK BRACKET (IF REQUIRED) ................................................... 46

STEP 16 - VEHICLE TAILLIGHT POSITIONING (IF REQUIRED) ...................................... 47

ATTACH DECALS ............................................................................................................... 48

TOUCHUP PAINT PRECAUTION ....................................................................................... 50

HYDRAULIC SYSTEM DIAGRAMS ................................................................................... 51

HYDRAULIC SCHEMATIC (GRAVITY DOWN) ................................................................... 51

HYDRAULIC SCHEMATIC (POWER DOWN) .................................................................... 52

ELECTRICAL SYSTEM DIAGRAMS ................................................................................. 53

ELECTRICAL SCHEMATIC (GRAVITY DOWN) ................................................................. 53

ELECTRICAL SCHEMATIC (POWER DOWN) ................................................................... 54

OPTIONS ........................................................................................................................... 55

RUBBER DOCK BUMPER KIT ........................................................................................... 56

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

4

SUMMARY OF CHANGES: M-03-05, REVISION J

PAGE DESCRIPTION OF CHANGE

COVER Updated REV and date of release.

6

Added note to installers to ensure that trucks and trailers are equipped with grab

handles if needed.

29 Removed AMSOIL from the table of recommended hydraulic oil.

55 Removed LVTS options from the OPTIONS table.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

5

WARNINGS

 Do not stand, or allow obstructions, under the platform when lowering the Liftgate. Be sure your

feet are clear of the Liftgate.



edges) when operating the Liftgate.

 Make sure vehicle battery power is disconnected while installing Liftgate. Connect vehicle

battery power to the Liftgate only when installation is complete or as required in the installation

instructions.

Comply with the following WARNINGS and SAFETY INSTRUCTIONS while installing

Liftgates. See Operation Manual for operating safety requirements.

 If it is necessary to stand on the platform while operating the Liftgate, keep your feet and any

objects clear of the inboard edge of the platform. Your feet or objects on the platform can become

trapped between the platform and the Liftgate extension plate.

 Never perform unauthorized modications on the Liftgate. Modications may result in early failure

of the Liftgate and may create hazards for Liftgate operators and maintainers.



people and vehicles passing by.

WARNING

 Recommended practices for welding on steel parts are contained in the current 

Welding Society) D1.1 Structural Welding Code - Steel. Damage to Liftgate and/or vehicle, and

personal injury can result from welds that are done incorrectly.

!

 Welding on galvanized parts gives off especially hazardous fumes. Comply with WARNING decal

on the galvanized part 

FIG. 5-1). To minimize hazard remove galvanizing from weld area, provide

adequate ventilation, and wear suitable respirator.

FIG. 5-1

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

6

NOTICE

 Maxon Lift is responsible for the instructions to correctly install MAXON Liftgates on

trucks or trailers only.

 Liftgate installers, not Maxon Lift, are responsible for reviewing and complying with all

applicable Federal, State, and Local regulations pertaining to the trailer or truck.

SAFETY INSTRUCTIONS

 Comply with all WARNING and instruction decals attached to the Liftgate.

 Keep decals clean and legible. If decals are illegible or missing, replace them. Free replacement

decals are available from .

 Consider the safety and location of bystanders and location of nearby objects when operating the

Liftgate. Stand to one side of the platform while operating the Liftgate.

 Wear appropriate safety equipment such as protective eyeglasses, faceshield and clothing while

performing maintenance on the Liftgate and handling the battery. Debris from drilling and contact

with battery acid may injure unprotected eyes and skin.

 Do not allow untrained persons to operate the Liftgate.

 Be careful working by an automotive type battery. Make sure the work area is well ventilated and

there are no ames or sparks near the battery. Never lay objects on the battery that can short the

terminals together. If battery acid gets in your eyes, immediately seek rst aid. If acid gets on your

skin, immediately wash it off with soap and water.

 If an emergency situation arises (vehicle or Liftgate) while operating the Liftgate, release the con-

trol switch to stop the Liftgate.

 Read and understand the instructions in this Installation Manual before installing Liftgate.

 Before operating the Liftgate, read and understand the operating instructions in Operation

Manual.

 A correctly installed Liftgate operates smoothly and reasonably quiet. The only noticeable noise

during operation comes from the power unit while the platform is raised and lowered. Listen for

scraping, grating and binding noises and correct the problem before continuing to operate Liftgate.

 Installers of the liftgate should ensure that all trucks and trailers are equipped with grab

handles as needed.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

7

Prevent injuries and equipment damage. Before cutting the shipping straps from

the Liftgate, put Liftgate on level ground that will support at least 1500 pounds. Be



straps are removed.

CAUTION

!

72-25 & 72-30 LIFTGATE COMPONENTS

NOTE: Make sure you have all components and parts before you start installing Liftgate.

Compare parts in the part box and each kit box with packing list enclosed in

each box. If parts and components are missing or incorrect, call:







72-25 & 72-30 COMPONENTS

FIG. 7-1

72-25 & 72-30 LIFTGATE

RAMP FLIPOVER

WEDGE FLIPOVER

SPECIAL PROFILE FLIPOVER

WITH ALUMINUM RETENTION RAMP

EXTENSION PLATE

PARTS BOX

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

8

PARTS BOX FOR 72-25 & 72-30 GRAVITY DOWN

PARTS BOX COMPONENT QTY. PART NUMBER

REF

PARTS BOX, 72-25, GRAVITY DOWN

1

266403-01

PARTS BOX, 72-30, GRAVITY DOWN 266403-02

1 SCREW, TAPPING #10 X 1/2” LG 4 030458

2 CLIP, FRAME 7 050079

3 HANDLE, RUBBER 1 055011

4 CLAMP, JIFFY #130 1 125674

5 PIN, 3-1/4” LG. 2 203405-05

6 RENTAL LOCK BRACKET (OPTIONAL) 1 203417

7 INNER BRACKET, RENTAL LOCK (OPTIONAL) 1 203570

 TIE, PLASTIC 7” 10 205780

9 TIE, PLASTIC 12”-14” 8 206864

10 CLAMP, #8 RUBBER LOOM 3 214663

11 SPRING, EXTENSION 1 215345

12 PIN, ROLL 3/8” X 2” LG. 2 904717-06

13 LUG, 2 GA COPPER 1 906497-02

14 SHIM, 1/8” X 2” X 2” 2 251333

15 MOLDED SWITCH ASSEMBLY 1 267959-01

16 CABLE ASSY, 175 AMPS, 38’ LG. 1 264422

17

KIT, MANUAL & DECAL 1

266404-01 (72-25)

266404-02 (72-30)

A. MANUAL, INSTALLATION 1 M-03-05

B. MANUAL, OPERATION 1 M-03-06

C. DECALS -

REFER TO DECAL PAGES IN

THIS MANUAL

 SCREW, SELF TAPPING, #10-24 X 1” LG. 2 900057-5



NOTE: To nd maintenance & parts information for your 72-25 & 72-30 Liftgate, go

to . Click the PRODUCTS,  72-25/30 but-

tons. Open the Maintenance Manual in the PRODUCT DOCUMENTATION

window.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

9

PARTS BOX FOR 72-25 & 72-30 GRAVITY DOWN



TABLE 9-1

PARTS BOX COMPONENT QTY. PART NUMBER

REF

PARTS BOX, 72-25, GRAVITY DOWN,

(FLIPOVER WITH ARR)

1

266403-03

PARTS BOX, 72-30, GRAVITY DOWN

(FLIPOVER WITH ARR)

266403-04

1 SCREW, TAPPING #10 X 1/2” LG 4 030458

2 CLIP, FRAME 7 050079

3 HANDLE, RUBBER 1 055011

4 CLAMP, JIFFY #130 1 125674

5 PIN, 3-1/4” LG. 2 203405-05

6 RENTAL LOCK BRACKET (OPTIONAL) 1 203417

7 INNER BRACKET, RENTAL LOCK (OPTIONAL) 1 203570

 TIE, PLASTIC 7” 10 205780

9 TIE, PLASTIC 12”-14” 8 206864

10 CLAMP, #8 RUBBER LOOM 3 214663

11 SPRING, EXTENSION 1 215345

12 PIN, ROLL 3/8” X 2” LG. 2 904717-06

13 LUG, 2 GA COPPER 1 906497-02

14 SHIM, 1/8” X 2” X 2” 2 251333

15 MOLDED SWITCH ASSEMBLY 1 267959-01

16 CABLE ASSY, 175 AMPS, 38’ LG. 1 264422

17

KIT, MANUAL & DECAL 1

266404-01 (72-25)

266404-02 (72-30)

A. MANUAL, INSTALLATION 1 M-03-05

B. MANUAL, OPERATION 1 M-03-06

C. DECALS -

REFER TO DECAL PAGES IN

THIS MANUAL

 SCREW, SELF TAPPING, #10-24 X 1” LG. 2 900057-5

19 ROLL PIN 1 905033-1

20 PIN, TORSION BAR 1 253805

21 SPACER, BUSHING, 1/4” 1 253808

NOTE: To nd maintenance & parts information for your 72-25 & 72-30 Liftgate, go

to . Click the PRODUCTS,  72-25/30 but-

tons. Open the Maintenance Manual in the PRODUCT DOCUMENTATION

window.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

10

PARTS BOX FOR 72-25 & 72-30 POWER DOWN

TABLE 10-1

PARTS BOX COMPONENT QTY. PART NUMBER

REF

PARTS BOX, 72-25, POWER DOWN

1

266403-51

PARTS BOX, 72-30, POWER DOWN 266403-52

1 SCREW, TAPPING #10 X 1/2” LG 4 030458

2 CLIP, FRAME 7 050079

3 HANDLE, RUBBER 1 055011

4 CLAMP, JIFFY #130 1 125674

5 PIN, 3-1/4” LG. 2 203405-05

6 RENTAL LOCK BRACKET (OPTIONAL) 1 203417

7 INNER BRACKET, RENTAL LOCK (OPTIONAL) 1 203570

 TIE, PLASTIC 7” 10 205780

9 TIE, PLASTIC 12”-14” 8 206864

10 CLAMP, #8 RUBBER LOOM 3 214663

11 SPRING, EXTENSION 1 215345

12 PIN, ROLL 3/8” X 2” LG. 2 904717-06

13 LUG, 2 GA COPPER 1 906497-02

14 SHIM, 1/8” X 2” X 2” 2 251333

15 MOLDED SWITCH & CABLE ASSEMBLY 1 264951-04

16 CABLE ASSY, 175 AMPS, 38’ LG. 1 264422

17

KIT, MANUAL & DECAL 1

266404-01 (72-25)

266404-02 (72-30)

A. MANUAL, INSTALLATION 1 M-03-05

B. MANUAL, OPERATION 1 M-03-06

C. DECALS -

REFER TO DECAL PAGES IN

THIS MANUAL

 SCREW, SELF TAPPING, #10-24 X 1” LG. 2 900057-5

NOTE: To nd maintenance & parts information for your 72-25 & 72-30 Liftgate,

go to . Click the PRODUCTS,  72-25/30

buttons. Open the Maintenance Manual in the PRODUCT DOCUMENTA-

TION window.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

11

TABLE 11-1

PARTS BOX FOR 72-25 & 72-30 POWER DOWN



PARTS BOX COMPONENT QTY. PART NUMBER

REF

PARTS BOX, 72-25, POWER DOWN,

(FLIPOVER WITH ARR)

1

266403-53

PARTS BOX, 72-30, POWER DOWN

(FLIPOVER WITH ARR)

266403-54

1 SCREW, TAPPING #10 X 1/2” LG 4 030458

2 CLIP, FRAME 7 050079

3 HANDLE, RUBBER 1 055011

4 CLAMP, JIFFY #130 1 125674

5 PIN, 3-1/4” LG. 2 203405-05

6 RENTAL LOCK BRACKET (OPTIONAL) 1 203417

7 INNER BRACKET, RENTAL LOCK (OPTIONAL) 1 203570

 TIE, PLASTIC 7” 10 205780

9 TIE, PLASTIC 12”-14” 8 206864

10 CLAMP, #8 RUBBER LOOM 3 214663

11 SPRING, EXTENSION 1 215345

12 PIN, ROLL 3/8” X 2” LG. 2 904717-06

13 LUG, 2 GA COPPER 1 906497-02

14 SHIM, 1/8” X 2” X 2” 2 251333

15 MOLDED SWITCH & CABLE ASSEMBLY 1 264951-04

16 CABLE ASSY, 175 AMPS, 38’ LG. 1 264422

17

KIT, MANUAL & DECAL 1

266404-01 (72-25)

266404-02 (72-30)

A. MANUAL, INSTALLATION 1 M-03-05

B. MANUAL, OPERATION 1 M-03-06

C. DECALS -

REFER TO DECAL PAGES IN

THIS MANUAL

 SCREW, SELF TAPPING, #10-24 X 1” LG. 2 900057-5

19 ROLL PIN 1 905033-1

20 PIN, TORSION BAR 1 253805

21 SPACER, BUSHING, 1/4” 1 253808

NOTE: To nd maintenance & parts information for your 72-25 & 72-30 Liftgate, go

to . Click the PRODUCTS,  72-25/30 but-

tons. Open the Maintenance Manual in the PRODUCT DOCUMENTATION

window.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

12

1. Check for correct clearances 

& 12-2) on vehicle to prevent interference

between vehicle and Liftgate.

NOTE: Dimensions are provided as a reference only for tting Liftgate to vehicle body.

VEHICLE REQUIREMENTS





FIG. 12-1



FIG. 12-2







32-1/2”

MAX.

23-1/2” MAX.

11-1/2” MIN.

37”







32-1/2”

MAX.

23-1/2” MAX.

17-1/2” MIN.

37”

CYLINDER

FRAME

CYLINDER

FRAME



NOTE: Make sure vehicle is parked on level ground while preparing vehicle and

installing Liftgate.

NOTE: A clearance area 8” wide is

required for the cylinder frame at

center of vehicle (lengthwise).

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

13

VEHICLE REQUIREMENTS - Continued

BODY FLOOR

VEHICLE FRAME CUT FOR 72-25 & 72-30

FIG. 13-1

2. Fit Liftgate to truck body by cutting frame as shown in FIG. 13-1.

6”

16-1/2”

15”

BODY CROSS MEMBERS

SPACER

CUT THIS AREA ONLY



BODY FRAME

REAR SILL



11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

14

STEP 1 - WELD EXTENSION PLATE TO VEHICLE

EXTENSION PLATE WELDS - VIEWED FROM ABOVE

FIG. 14-1

1. Center the extension plate

on vehicle body. Weld the

extension plate to vehicle

body sill as shown in

FIGS. 14-1 and 14-2.



EQUALLY SPACED

BETWEEN 5” LG

WELDS

5” LG  4 PLACES

CENTER OVER WIDTH

OF 2 CHANNELS AND 2

-

PLATE - SEE DASHED

LINES)

1/4”

EXTENSION PLATE WELDS - VIEWED FROM UNDERNEATH

FIG. 14-2

SILL



VEHICLE BODY)



GAP WHERE SHOWN

1/4”

2” LG, 6 PLACES

EQUAL SPACING



1/4”



GAP WHERE SHOWN

1” GAP

NOTE: Before welding extension plate to vehicle body, make sure:

• Inboard edge of extension plate is ush with the top of sill on vehicle body.

• Top surface of extension plate is level with the ground.

EDGES FLUSH, SILL

& EXTENSION PLATE

LEVEL WITH

THE GROUND

1/4”

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

15

STEP 1 - WELD EXTENSION PLATE TO VEHICLE -

Continued

2. Get the extension spring from parts box. Hook one end of spring in loop

under extension plate . Next, hook opposite end of spring

in eye of the safety hook .

EXTENSION PLATE

EXTENSION SPRING PLACEMENT

FIG. 15-1A



- RH SIDE VIEW

FIG. 15-1B



SAFETY



EXTENSION

SPRING

EYE

LOOP

EXTENSION PLATE

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

16



STRAP OVERHANG)

1/4”

STRAP & SPACER WELDS



ENDS OF EXTENSION PLATE)

FIG. 16-3B

2. Place 2 temporary support straps 

3A) on the extension plate as shown in FIG.

16-3A. Also, put 2 temporary spacers 

16-3B) between platform and extension plate

as shown in FIG. 16-3B. Weld the straps and

spacers to extension plate .



FIG. 16-3A

1. Make 2 support straps  and

2 spacers  to keep Liftgate in

proper position. While welding Liftgate to

vehicle, support straps keep platform level

with extension plate and spacers keep 1/8”

between platform and extension plate.

SPACER



FIG. 16-2

1”

2-1/2”

STEP 2 - WELD LIFTGATE TO VEHICLE

SUPPORT STRAP



FIG. 16-1

5”

4”



SPACER OVERHANG)

14”

EXTENSION

PLATE

SUPPORT

STRAPS



STRAP TO EXTENSION



SPACER & SUPPORT

STRAP TO EXTENSION



4”

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

17

3. Unfold the platform as shown in

FIG. 17-1.

UNFOLDED PLATFORM

FIG. 17-1

4. Attach chain and hoist on each

side of platform at positions

shown in FIG. 17-2. (Place

chain all around platform.)

Hoist the Liftgate and then

place oor jack under main

frame . Jack the

Liftgate in position. Make sure

vehicle oor is horizontal and

pins are lined up as shown in

FIG. 17-2.



STEP 2 - WELD LIFTGATE TO VEHICLE - Continued

FIG. 17-2

WARNING

!

Do not remove lock strap

until instructed to do so in

this manual.



MAIN FRAME

MOUNTING

PLATE

VEHICLE FLOOR



HOIST HERE

PINS

VERTICAL

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

18

STEP 2 - WELD LIFTGATE TO VEHICLE - Continued

Liftgate is shipped from factory with mounting plates that are only tack weld-

ed to main frame. Weld as shown in illustration before operating Liftgate.

WARNING

!



a protective cover such as a welding blanket to cover the hoses.

CAUTION

5. Check if both mount-

ing plates line up with

the vehicle frame. If the

mounting plates do not

line up, remove the tack

welds from one mount-

ing plate.

Make sure Liftgate stays

centered on vehicle. Re-

position the mounting plate

against vehicle frame. Tack

weld as shown in .

Repeat for second mounting

plate (reposition and tack

weld).

NOTE: Weld both mounting plates to

vehicle frame before welding

mounting plates to main frame.

MOUNTING

PLATE

WELD TO VEHICLE FRAME AND MAIN FRAME





2” LG. 4 PLACES



MOUNTING

PLATES)

6. Clamp both mounting plates

to vehicle frame. Weld the

mounting plates to vehicle

frame as shown in 

2. Next, weld both mounting

plates to main frame

. Remove clamps.





MOUNTING PLATE)

1/4”





MOUNTING PLATES)

REPOSITIONING MOUNTING PLATE





MAIN FRAME



MOUNTING

PLATE

VEHICLE FRAME



SHOWN)

VEHICLE FRAME



SHOWN)

1/4”

MAIN FRAME



1/4”

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

19

STEP 2 - WELD LIFTGATE TO VEHICLE - Continued

CYLINDER FRAME SUPPORT -





FIG. 19-1

3” LG.

6” MAX.

CYLINDER

FRAME

ANGLE





RAIL

3/16”

 Position the angle at against the

cylinder frame and tight against the

bottom ange of the truck frame rails

. Weld the angle to the

cylinder frame only .

Skip instructions 9 through 11.

NOTE: In the following instructions, there are 3 ways to weld a support to cylinder

frame. If you use the angle support, do instructions 7 and 8, or do 9 and 10.

If you use the strap support, only do instruction 11.

F

Prevent damage to cylinder on some installations. If top of cylinder touches



cylinder frame and and support angle. Spacer thickness is as required to create

clearance between cylinder and support angle.

CAUTION



CONTACT WITH

CYLINDER



7. Measure height of truck frame

rails as shown in FIG. 19-1. If the

frame is over 6” in height, skip

this instruction and go to instruc-

tion 9. If the frame is 6” maxi-

mum in height, make a support

as follows. Measure distance “F”

between outer edges of truck

frame . Cut a support

the same length as “F” 

19-1) from the 2-1/2” x 2-1/2”

x 34” long steel angle supplied

with the Liftgate.

11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713

20

STEP 2 - WELD LIFTGATE TO VEHICLE - Continued

11. Make a support strap as fol-

lows. Cut a 36” long support

from A-36 general purpose

1/4” x 2” at steel. (Flat is not

supplied by MAXON.) Fit the

strap to the cylinder frame and

cross member .

Weld the strap as shown in

FIG. 20-2.

1/4” FLAT

CYLINDER FRAME SUPPORT STRAP

FIG. 20-2

CYLINDER

FRAME



RAIL

3/16”

CROSS

MEMBER

3” LG. MIN.



AS POSSIBLE)

WRAP CORNERS

3” LG. MIN.



AS POSSIBLE)

WRAP CORNERS

10. Position the angle between

the truck frame rails and at

against the cylinder frame 

20-1). Make sure angle ts

tight against the top ange of

the truck frame rails. Weld the

angle to the cylinder frame only

. Skip instruction

11.

CYLINDER FRAME SUPPORT -





FIG. 20-1

3” LG.

OVER 6”

CYLINDER

FRAME

ANGLE



3/16”



RAIL

F



CONTACT WITH

CYLINDER



9. If the frame is over 6” in height

, make a support as

follows. Measure distance “F”

between inside of truck frame

rails . Cut a support,

1/2” shorter than “F” 

1), from the 2-1/2” x 2-1/2” x 34”

long steel angle supplied with the

Liftgate.

3/16”

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Maxon 72-25 & 72-30 REV. J (SEPTEMBER 2015) Installation guide

Maxon 72-25 & 72-30 REV. J (SEPTEMBER 2015) Installation guide

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