Jacobsen LMAC069 Owner's manual

Brand: Jacobsen

Model: LMAC069

Category: Lawnmowers

Type: Owner's manual

Jacobsen LMAC069 is a backlap kit designed for G-PLEX III machines (DN Series only). It allows the reels to be driven in reverse for backlapping, a process that lightly grinds the reel to the bedknife while mounted on the mower. This can help to improve the cutting performance of the machine.

The kit includes a backlap valve, hydraulic fittings, a handle, a microswitch, a switch bracket, screws, nuts, and washers. It also comes with instructions for installation and use.

Capabilities

Allows the reels to be driven in reverse for backlapping
Improves the cutting performance of the machine

The kit includes a backlap valve, hydraulic fittings, a handle, a microswitch, a switch bracket, screws, nuts, and washers. It also comes with instructions for installation and use.

Capabilities

Allows the reels to be driven in reverse for backlapping
Improves the cutting performance of the machine

RJL 100 April 2009

WARNING: If incorrectly used this machine can cause severe

injury. Those who use and maintain this machine should be

trained in its proper use, warned of its dangers and should

read the entire manual before attempting to set up, operate,

adjust or service the machine.

Fitting Instructions

G-Plex III - Backlap Kit LMAC069

24596G (rev.2)

Series : DN - Engine type: Briggs & Stratton 350447

Product code: USAG001

Series : FJ - Engine type: Briggs & Stratton 350447

Product code: USAG002

G-PLEX III BACKLAP KIT

INSTALLATION INSTRUCTIONS LMAC069

NOTICE

INSTALLATION INSTRUCTIONS

IMPORTANT!

Read all instructions thoroughly before beginning installation. When you complete the installation,

put this instruction with operator’s manual in the bag on the vehicle. These instructions alert you to

certain things you should do very carefully, if you don’t, you could: hurt yourself or bystanders, hurt

the next person who operates the equipment, or damage the accessory or the vehicle it is used on.

This “HAZARD” symbol is used to alert you to information about unsafe actions or situations,

and will be followed by the word DANGER, WARNING, or CAUTION. Used with the word DANGER it will

describe immediate hazards that may result in severe personal injury or death. With the word WARNING it will

describe unsafe actions or situations that may cause severe injury, death and/or major equipment or property

damage. With the word CAUTION it will describe unsafe actions or situations that may cause injury, and/or

minor equipment or property damage.

This NOTICE symbol is used to alert you to information that describes procedures or tips

that will help you install, operate and maintain you equipment.

FITTING INSTRUCTIONS, PART NO. LMAC069

FOR G-PLEX III - (DN Series Only)

Backlap Kit

· Before beginning, read through this instruction manual and familiarise yourself with all the parts in the

Backlap Kit and the steps for proper installation.

· The left or right side or the machine will always be determined from the operator’s seated position.

· Place the cutting units in the lowered position and make sure the ignition key is removed from

the ignition switch. Then disconnect Battery Negative Lead and place in safe position.

Ensure Battery Negative Lead is

disconnected.

CAUTION

G-PLEX III BACKLAP KIT

INSTALLATION INSTRUCTIONS LMAC069

Fig 1

Fig 2

Fig 3

Fitting Instructions

1. Locate Backlap Valve from Kit and

Assemble Hydraulic Fittings(3 off elbow

4192320 & 1 off Tee4199983 ) and

Handle (4197680) as per photo. (Fig.1).

4. Remove indicated Hydraulic parts

(4124173, 002540080, 4124349, 4124172).

Note Hydraulic Pipe 894245, requires

disconnecting and assembling so the

opposite ends are connected. (Fig. 3)

2. Disconnect Battery earth strap.

3. Lift up Seat plate to expose current

hydraulic piping. (Fig.2)

G-PLEX III BACKLAP KIT

INSTALLATION INSTRUCTIONS LMAC069

Fig 4

Fig 5

Fitting Instructions

5. Fasten assembled Backlap Valve to

Machine,place the spacer pad ( 4197621)

under the valve before secure to the plate

using using M6 x 35 Screws (450002) and

M6 Nyloc Nuts (450377) 2 per Valve. Fit

new pipe 894248, Connect up pipes and

tighten fittings. (Fig.4)

6. Assemble Microswitch (4142765) onto

switch bracket (4146471), using nut

(4142766) so that the switch is in line with

the valve.

Note use the holes that are closer to the

valve and in the higher position (Fig. 6)

Then fasten this sub-assembly to

Machine, using screw (456110016),

washer (452100019), lockwasher

(452200029) & nut (450120013).

7. Remove cable tie securing the splice for the

backlap switch on the main wiring harness.

Connect backlap switch (4142765) to

backlap switch upgrade link (4154620) then

this connects to the splice.

Ensure wiring once connected, will not get

pinched/trapped.

Reconnect Battery earth strap and test.

Holes new valve

& switch pos’

Fig 6

G-PLEX III BACKLAP KIT

INSTALLATION INSTRUCTIONS LMAC069

1. Restriction Valve

2. Backlap Valve

3. Reel Control Lever

A. Mow Position

B. Backlap Position

N. Neutral Position

ALWAYS open the restriction valve

before setting the reel control lever to

BACKLAP position. DO NOT set the reel

control lever to the BACKLAP position

before opening the needle valve in the

bypass circuit. This will cause the reels

to start turning IMMEDIATELY at full

speed.

Keep hands, feet and clothing away from

all three reels whenever the reel control

lever is placed in the backlap position.

When backlap restriction valve is closed

or being closed, all three reels will rotate

in the backlap direction.

WARNING

BACKLAPPING

When fitted with this device it allows the reels to be

driven in reverse for backlapping.

• Backlapping is a process which will lightly

grind the reel to the bedknife whilst

mounted on the mower.

• If significant amounts of metal are to be

removed then the cutting unit should be

reground on a specialised grinding

machine.

• Before any backlapping is carried out,

Ransomes Jacobsen recommends that the

backlapping process should be risk

assessed as a workshop process by the

manager of the machine.

• Backlapping should only be carried out by

trained staff.

• Ransomes Jacobsen recommend that

grinding paste is only applied to the reel

when it is stationery, the engine is off and

the parking brake applied.

• When applying grinding paste the reel

should only be rotated by appropriately

sized piece of wood and not by hand.

• Place reels in the most accessible

position for applying the paste.

• Leave the grass boxes in position on the

cutting units as a safety barrier.

• After applying the grinding paste the

backlapper should return to the seat,

engage the relevant controls and run the

reels in reverse.

• When the desired finish is achieved switch

off the mower, clean off any surplus paste,

reset the reel to bedknife and return the

controls to the normal mow positions.

Ransomes Jacobsen grinding paste:

80 grit grinding paste, 4.5kg tin,

Part number 5002488

120 grit grinding paste, 4.5kg tin,

Part number 5002489

80 grit grinding paste, 9kg tin,

Part number 5002490

120 grit grinding paste, 9kg tin,

Part number 5002491

G-PLEX III BACKLAP KIT

INSTALLATION INSTRUCTIONS LMAC069

G-PLEX III BACKLAP KIT

INSTALLATION INSTRUCTIONS LMAC069

Backlap Kit

10,11

G-PLEX III BACKLAP KIT

INSTALLATION INSTRUCTIONS LMAC069

* Not Illustrated

LIST OF PARTS

ITEM RANSOMES DESCRIPTION QTY REMARKS

PART NO

1 2208047 Valve,4-Way, 3 Position 1

2 843411 Lever 1

3 844071 Tee, Branch 1” ORFS -14 1

4 W158007-03 90-M/M 13/16” ORS x 7/8 SAE 1

5 W158007-02 90-M/M 13/16” ORS x 3/4” SAE 2

6 450008 Bolt-Hex M6 X 65 3

7 450377 Nut-Hex M6 Nyloc 3

8 4146471 Bracket, Switch Mtg 1

9 456110016 Screw-Hex 1/4”-20 x 3/4” 2

10 452100019 Washer - 1/4” x 5/8” x .064” 2

11 452200029 Lockwasher 1/4” x .425 x .072 2

12 450120013 Nut-Hex 1/4” -20 2

13 894248 Line Ay, Hydraulic 1

14 4142765 N/O Switch (Delta) 1

15 4142766 Nut for Switch 1

* 4154620 Backlap Switch Upgrade Link 1

From Jan 2009

1 4192304 Valve,4-Way, 3 Position 1

2 4197680 Lever 1

3 4199983 Tee, Branch 1” x 1/2” x 1” 1

* 4197621 Spacer Pad 1 To be placed under valve

4 4192320 90-M/M 13/16” ORS x 1/2” BSP 3

6 450008 Bolt-Hex M6 X 65 3

7 450377 Nut-Hex M6 Nyloc 3

8 4146471 Bracket, Switch Mtg 1

9 456110016 Screw-Hex 1/4”-20 x 3/4” 2

10 452100019 Washer - 1/4” x 5/8” x .064” 2

11 452200029 Lockwasher 1/4” x .425 x .072 2

12 450120013 Nut-Hex 1/4” -20 2

13 894248 Line Ay, Hydraulic 1

14 4142765 N/O Switch (Delta) 1

15 4142766 Nut for Switch 1

* 4154620 Backlap Switch Upgrade Link 1

A 894244 Line, Hydraulic 1 Not Supplied in Kit

B 894245 Line, Hydraulic 1 Not Supplied in Kit

C 002540080 Tee, Branch 1 Not Supplied in Kit

D 4124173 Tube 1 Not Supplied in Kit

E 4124349 Adaptor Elbow, 90 2 Not Supplied in Kit

Backlap Kit

Ransomes Jacobsen Limited

West Road, Ransomes Europark, Ipswich, IP3 9TT

English Company Registration No. 1070731

www.ransomesjacobsen.com

Jacobsen, A Textron Company

11108 Quality Drive, Charlotte,

NC 28273, USA

www.Jacobsen.com

Jacobsen LMAC069 Owner's manual

Brand: Jacobsen

Model: LMAC069

Category: Lawnmowers

Type: Owner's manual

The kit includes a backlap valve, hydraulic fittings, a handle, a microswitch, a switch bracket, screws, nuts, and washers. It also comes with instructions for installation and use.

Capabilities

Allows the reels to be driven in reverse for backlapping
Improves the cutting performance of the machine

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Jacobsen LMAC069 Owner's manual

Jacobsen LMAC069 Owner's manual

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