Remove/install hydraulic motor of Hydraulic Auxiliary Drive (HAD)

AR55.90-W-0010HD

Remove/install hydraulic motor of Hydraulic Auxiliary Drive (HAD)

12.02.2019

Model

963, 964

with code A1H (Hydraulic Auxiliary Drive (HAD))

Modification notes

17.09.2015

Document completely revised.

1

Screw

5

O-ring

9

Hydraulic motor

2

Cover

6

Screw

10

Wheel flange

3

O-ring

7

Hydraulic motor hub

11

Stub axle

4

Cam ring

8

O-ring

12

Half-shell

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

 Danger

Risk of death caused by vehicle slipping or toppling off during lifting

Only lift vehicle at the lift support points specified by the vehicle manufacturer.

AS00.00-Z-0032-01A

 Warning

Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning from swallowing hydraulic fluid.

Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Topical note

Special instructions for lifting and supporting vehicle

AH00.60-N-0100-01B

Topical note

Notes on avoiding damage due to contamination and foreign objects when working on hydrostatic auxiliary drive (HAD)

AH55.90-N-0001-01A

Topical note

Notes on assessing leaks on Hydraulic Auxiliary Drive (HAD)

AH55.90-N-0001-02A



Remove

1

Remove wheel

AR40.10-W-1100H

2

Remove cover (2)

AR55.90-W-0010-01HD

 Collect and dispose of oil.

 Guide pin

*963589003400

3

Remove cam ring (4)

AR55.90-W-0010-02HD

 Guide pin

*963589003400

4

Remove hydraulic motor hub (7)

AR55.90-W-0010-03HD


The inner and outer parts of the hydraulic motor hub (7) must not be axially displaced relative to each other or fully disassembled.
Otherwise, damage may occur when assembling.

5

Remove hydraulic motor (9) from steering knuckle spindle (11)

AR55.90-W-0010-04HD



Install

6

Mount hydraulic engine (9) onto steering knuckle spindle (11)

AR55.90-W-0010-04HD

Protrusion of hydraulic motor to steering knuckle spindle

*BE55.90-N-1002-01A

7

Install hydraulic engine distributor (7)

AR55.90-W-0010-03HD


The inner and outer parts of the hydraulic motor hub (7) must not be axially displaced relative to each other or fully disassembled.
Otherwise, damage may occur when assembling.

 Replace O-rings (8).
Tighten bolts (6) in crosswise pattern.

 Bolt, hydraulic motor distributor to steering knuckle spindle

*BA55.90-N-1006-01A

MB multipurpose grease, 400 g

*BR00.45-Z-1017-06A

8

Install cam ring (4)

AR55.90-W-0010-02HD

 Guide pin

*963589003400

9

Install cap (2)

AR55.90-W-0010-01HD

 Tighten bolts (1) uniformly crosswise and in 2 stages.

 Bolt, hydraulic motor cover to wheel flange

*BA55.90-N-1007-01A

 Guide pin

*963589003400

10

Fit wheel

AR40.10-W-1100H

11.1

Drain/fill hydraulic fluid of Hydraulic Auxiliary Drive (HAD) and bleed system

If a new hydraulic engine (9) has been installed.

AR55.90-W-0006A

11.2

Bleed Hydraulic Auxiliary Drive (HAD) system

If the previous hydraulic engine (9) was reinstalled.

AR55.90-W-0010-06HD

 Gear oil

*BF55.90-N-1001-03A

Hydraulic auxiliary drive (HAD)

Number

Designation

Model 963, 964 with code A1H (Hydraulic Auxiliary Drive (HAD))

BE55.90-N-1002-01A

Protrusion of hydraulic motor to steering knuckle spindle

mm

5,35 (0,05)

 Hydraulic auxiliary drive (HAD)

Number

Designation

Model 963, 964 with code A1H (Hydraulic Auxiliary Drive (HAD))

BA55.90-N-1006-01A

Bolt, hydraulic motor distributor to steering knuckle spindle

M10x70

Nm

85

 Hydraulic auxiliary drive (HAD)

Number

Designation

Model 963, 964 with code A1H (Hydraulic Auxiliary Drive (HAD))

BA55.90-N-1007-01A

Bolt, hydraulic motor cover to wheel flange

M12x85

Stage 1

Nm

30

Stage 2

°

90

 Hydraulic auxiliary drive (HAD)

Number

Designation

MODEL 963, 964 with CODE A1H (HAD)

BF55.90-N-1001-03A

Gear oil

Filling capacity

l

35

Sheet

BB00.40-P-0235-11A

Repair materials

Number

Designation

Order number

BR00.45-Z-1017-06A

MB multipurpose grease, 400 g

A 001 989 34 51 11