MacDon MD #169874 C M155 Installation guide

169874 Revision C Page 1 of 38

Contents

Installation Instructions .............................................................................................................................. 2

Replacing Front Shock Mounts ............................................................................................................. 2

Replacing Side Stabilizing Members .................................................................................................... 8

Replacing Center Stabilizing Member ................................................................................................ 11

Removing Rear Shock Supports ......................................................................................................... 13

Installing Hydraulic Insulators –Multifunction Control Block .......................................................... 25

Installing Hydraulic Insulators – Drive Manifold ............................................................................... 27

Installing Hydraulic Insulators – Return Manifold Assembly ........................................................... 29

Installing Cable Ties ............................................................................................................................. 36

Part List .................................................................................................................................................. 37

Self-Propelled Windrowers

M155 Cab Isolation Kit (MD #166759)

(formerly B5925)

Installation Instructions

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 2 of 38

The Cab Isolation kit (MD #166759) can be used to reduce noise in the cab on MacDon M155 Self-

Propelled Windrowers, model year 2014 and earlier. Installation instructions are provided in this

document. A list of the parts included in the kit is provided at the end of the document.

The following special tools are required:

• Hydraulic jack (or EnerPac

®

type lifting device

• Block of wood (2 x 4 x 5 in. [51 x 102 x 127 mm])

Installation Instructions

NOTES:

• In these instructions, right and left are determined from the windrower operator’s position, facing

forward with the windrower in cab-forward position.

• Unless otherwise noted, use the standard torque values provided in the windrower operator’s

manual or technical manual.

To install the Cab Isolation kit, follow these steps:

Replacing Front Shock Mounts

NOTE: Shocks and shock mounts must be removed one at a time.

1. Place a small hydraulic jack (A) on the tubular

axle frame near the side of the cab as shown

at right.

2. Insert a block of wood (B) between the floor of

the cab and the top of the bottle jack in order to

distribute the force of the bottle jack through a

larger surface of the cab floor.

3. Remove 1/2 in. flange lock nut on bolt (A). DO

NOT remove bolt at this time as the shock is still

under load.

4. Using the hydraulic jack, lift the cab until lower

shock bolt (A) is loose.

Figure 1: Jack under Front RH Side of Cab

Figure 2: LH Front Shock

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 3 of 38

5. Remove hardware at bottom (A) and top (B) of

shock (C), and then remove shock. Retain

shock, but discard hardware.

6. Remove shock mount hardware (A) and

mount (B). Discard.

Figure 3: LH Front Shock

Figure 4: Old LH Front Shock Mount

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 4 of 38

7. Install the new shock mount (MD #166605) (A)

in the same location using two 1.5 in. long

carriage bolts (MD #21469) and two flange lock

nuts (MD #50186) (B) provided in kit. Do not

tighten hardware at this time.

8. Install insulator (MD #166530) top (A) and

bottom (B) into shock mount (C) as shown.

HINT: Use soap to ease installation.

9. Insert spacer (MD #166539) (D) into

insulator bore.

Figure 5: New LH Front Shock Mount

Figure 6: New LH Front Shock Mount

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 5 of 38

10. Insert shock channel weldment (MD #166579)

(A) into insulator.

11. Ensure bolt holes in shock (C) align with holes

in top mount (B) and bottom mount (A) before

tightening hardware in Step 12.

Figure 7: New LH Front Shock Mount Assembly

Figure 8: New LH Front Shock and Shock Mount

Assembly (Front Frame Cross Member Support and

Front Lower Panel Removed for Clarity)

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 6 of 38

12. With alignment verified, torque mount hardware

(A) to 54–59 ft·lbs (73–80 N·m).

13. Install mount flat washer (MD #166532) (B) and

flange nut (MD #50225) (C). Do not torque nut

(C) at this time.

14. Install shock (A) in new shock mount with one 3

in. long hex head bolt (MD #21560) (B) and one

flange lock nut (MD #50186) (C) provided in kit.

The bolt head must face the center of the frame.

Do not tighten.

15. Attach shock to top mount with one 2.75 in. long

hex head bolt (MD #21880) (D) and one flange

lock nut (MD #50186) (E), both provided in kit.

The bolt head must face the outer frame.

Torque both flange nuts (C and E) to 54–

59 ft·lbs (73–80 N·m).

Figure 9: New LH Front Shock Mount Assembly

Figure 10: LH Front Shock Installed in

New Shock Mount

(Front Frame Cross Member Support and Front

Lower Panel Removed for Clarity)

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 7 of 38

16. Lower and remove the bottle jack, then torque

the flange nut (A) to 75–80 lb-ft (102–108 N·m).

HINT: Use a large crescent wrench or pry bar to

prevent channel from rotating as shown at right.

17. Repeat Steps 1–16 on the other side of the cab.

Figure 12: Tightening Nut

Figure 11: LH Front Shock Installed in

New Shock Mount

(Front Frame Cross Member Support and Front

Lower Panel Removed for Clarity)

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 8 of 38

Replacing Side Stabilizing Members

1. Beneath the cab on both sides are stabilizing

members (A). On one side, remove hardware

(B), (F), and (G), and then remove link supports

(C) and (D). Discard.

HINT: Pushing cab rearward will assist with the

removal of (F). With (F) removed, allow cab to

shift forward to ease the removal of bolt (G) and

link supports (C) and (D).

2. Remove the rear mounting bolt (E) that attaches

the stabilizing members to the cab.

3. Remove cab stabilizing member (A). Discard.

4. Remove link support (A) and nuts from the

bottom of the cab. Discard.

5. Replace the old link support with the new rear

link support (MD #166641) provided in the kit.

Attach with the new flange lock nuts

(MD #50186) provided in the kit. Torque

hardware to 54–59 ft·lbs (73–80 N·m).

NOTE: New rear link support has an

identification notch on each side (see illustration

on next page).

Figure 13: Old LH Stabilizing Membe

r

Figure 14: Old Rear Link Support

Figure 15: New Rear Link Support

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 9 of 38

A – Identification notch

6. Install new front link support (MD #166639) (A)

and link support (MD #166640) (B) in place of

old link supports. Fasten in place with two

1.25 in. long carriage bolts (MD #21471) and

two lock nuts (MD #50186). Bolt threads should

face away from cab. Do not tighten.

NOTE: New link support has an identification

notch on one side (see illustration on

next page).

7. Attach new stabilizing member (MD #183209)

(C) to front (A) and rear (D) link supports with a

60 mm long metric hex head bolt (MD #152274)

and a metric hex flange nut (MD #136036) (E) at

each end.

Nut must face away from cab.

Figure 17: New Stabilizing Member Installed

Figure 16: New Rear Link Support (MD #166641)

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 10 of 38

A – Identification notch

8. Torque hardware (A) to 54–59 ft·lbs (73–

80 N·m).

9. Torque hardware (B) to 25–35 ft·lbs (34–

47 N·m).

10. Repeat Steps 1–9 on the other side of the cab.

Figure 19: Link Support Hardware

Figure 18: New Link Support (MD #166640)

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 11 of 38

Replacing Center Stabilizing Member

1. Beneath the cab is a lateral stabilizing member

which is mounted to the cab floor and to the

right side of the frame.

Remove the hardware (A) connecting the

stabilizing member (B) to the frame. Discard

hardware.

2. Remove the hardware (A) connecting the

stabilizing member (B) to the center link support

(C), and then remove the stabilizing member

(B). Discard.

3. Remove the hardware (D) connecting the center

link support (C) to the cab, and then remove the

center link support (C). Discard.

Figure 20: Old Center Stabilizing Membe

r

Figure 21: Old Center Stabilizing Membe

r

Figure 22: Old Center Link Support

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 12 of 38

4. Install new center link support (MD #166642) (A)

with existing welded bolts and two flange lock

nuts (MD #50186) (B) provided in kit. Torque to

54–59 ft·lbs (73–80 N·m).

NOTE: The new stabilizer mount has

identification notches ([A] in Figure 24 below).

5. Install new stabilizing member (MD #183209)

(C) with one 60 mm long metric hex head bolt

(MD #152274) and one metric hex flange nut

(MD #136036) (D) at each end. All parts are

provided in kit. Torque to 25–35 ft·lbs (34–

47 N·m).

6. Install new side link support (MD #166644) (A)

on the windrower frame with two 1.25 in. long

carriage bolts (MD #21471) and two flange lock

nuts (MD #50186) (B) provided in kit. Torque to

54–59 ft·lbs (73–80 N·m).

7. Attach new stabilizing member (C) to side link

support (A) with one 60 mm long metric hex

head bolt (MD #152274) and one metric hex

flange nut (MD #136036) (D) provided in kit.

Torque to 25–35 ft·lbs (34–47 N·m).

Figure 23: New Center Stabilizing Membe

r

Figure 25: New Center Stabilizing Membe

r

Figure 24: Center Link Support (MD #166642)

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 13 of 38

Removing Rear Shock Supports

NOTE: Shocks and shock supports must be

removed one at a time.

1. Place blocks (A) on the lower frame flange and

position it beneath the cab.

2. Place the jack (B) on the blocks. Place a block

of wood (C) on top of the jack.

3. Remove 1/2 in. flange lock nut that holds the

bolt at (D) on inside of frame from bolt.

Do not remove bolt (D) at this time as the

shock is still under load.

4. Using the jack, lift the cab until bolt (D) is loose.

For additional safety, place blocks (E)

between the windrower frame and the cab.

IMPORTANT: Damage to air conditioning

lines may occur if cab is lifted too high.

5. Remove the bolt at (D).

6. Remove the nut (A) connecting the rear upper

shock support (B) to the rear panel of the cab.

Figure 26: Jack on Rear Frame Flange

(Top: LH Side, Bottom: RH Side)

Figure 27: Old LH Rear Shock and Shock Support

(Left Lower Post of Cab Removed for Clarity)

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

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7. Inside the cab, under the training seat, the

Windrower Control Module (WCM) cover (A)

must be removed.

Pull up the cab insulation (C) to gain access to

the cover hardware (B), then remove the

hardware and the cover (A).

8. Remove WCM (A) from the cab wall.

NOTE: Do not unplug the WCM harness (B).

Figure 28: WCM with Cove

r

Figure 29: WCM with Cove

r

Figure 30: WCM with Cover Removed

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 15 of 38

9. Pull back floor mat and remove plastic cap (A).

10. Remove floor mount nut (A) and discard.

Figure 31: Beneath WCM

Figure 32: Beneath WCM

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 16 of 38

11. Remove rear upper shock support and shock.

12. Disconnect shock (A) from old shock support

(B). Discard support and hardware, but retain

shock.

Figure 33: Old LH Rear Upper Shock Support

and Shock

Figure 34: Rear Shock and Shock Support

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 17 of 38

13. Install insulator (MD #166530) (A) and spacer

(MD #166539) (B) in new left shock support

(MD #166695) (C) as shown at right. All parts

are provided in kit.

HINT: Use soap to ease installation.

14. Install new shock support onto cab.

You will need to remove approximately 2-

9/16 in. (65 mm) of foam insulation (B) from the

rear cab wall to fit the new parts in place.

Torque hardware (A) to 54–59 ft·lbs (73–

80 N·m).

Figure 36: Inside Rear Panel of Cab

Figure 35: New LH Rear Shock Support

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 18 of 38

15. Reinstall plastic cap (A) and floor mat.

16. Reinstall WCM, cover (A), hardware, and wall

insulation.

Figure 37: Beneath WCM

Figure 38: Beneath WCM

Figure 39: WCM Reassembled

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 19 of 38

17. Attach shock assembly (A), removed from

windrower in Step 10, to channel weldment

(MD #166579) (B) with a 3 in. long hex head

bolt (MD #21560) (C), flat washer (MD #18599)

(D), and a flange lock nut (MD #50186) (E). All

parts are provided in kit.

18. Torque hardware to 54–59 ft·lbs (73–80 N·m).

19. To install rear shock assembly into mount, insert

bolt (A) on the top of the rear shock assembly

(B) through the spacer in the top of the shock

mount assembly (C) as shown at right.

The bottom of the shock assembly (B) fits into

the shock support (D) on the windrower frame.

Figure 41: Rear Shock Assembly in

LH Rear Shock Mount

(Left Lower Post of Cab Removed for Clarity)

Figure 40: Rear Shock Assembly

M155 Self-Propelled Windrower Cab Isolation Kit MD #166759

INSTALLATION INSTRUCTIONS

169874 Revision C Page 20 of 38

20. Install flat washer (MD #166532) (A) and flange

nut (MD #50225) (B) onto bolt protruding from

top of rear shock mount assembly (C).

21. Torque flange nut (B) to 75–80 ft·lbs (102–

108 N·m).

HINT: Use a large crescent wrench or pry bar to

prevent channel from rotating.

22. Using the jack, lower the cab until the hole in

the bottom of the shock lines up with the hole

(A) in the shock support.

Figure 43: Shock Support

Figure 42: Rear Shock Assembly in

LH Rear Shock Mount

(Left Lower Post of Cab Removed for Clarity)

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MacDon MD #169874 C M155 Installation guide

MacDon MD #169874 C M155 Installation guide

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