Section E - Hydraulics
Drive Motors
Motors - Wheeled Machine
E - 82 E - 82
9803-9450-2
Important: Do not pick up the motor by the drive shaft as
this can cause damage to the balance plate 9.
Drain oil from motor. Make sure that the work area and the
exterior of the motor are clean before starting dismantling.
Match mark items 2, 9,13,15 and 17 to assist re-assembly.
Dismantle the motor in a vertical position as shown,
following the numerical sequence.
Take care not to lose ball checks 12.
Keep parts of rotor assembly 13 together as they are
closely matched during manufacture. If they are dropped,
carefully remove minor damage using a fine abrasive
stone.
Renew all parts where the mating surfaces have deep
scratches or burrs which will not easily polish out.
Wash all metal parts in clean solvent and blow dry using
compressed air. Do not use paper towels or cloth as lint in
the hydraulic system will cause damage.
Inspection
Assembly
Reverse the dismantling sequence with the following
exceptions.
Renew all seals, using petroleum jelly as a lubricant and to
hold them in position.
Lubricate machined surfaces with clean hydraulic fluid.
Install poppet 30, spring 29 and dash pot 28 into shuttle
valve bore from valve plate side of end cap 17. Install
shuttle piston 31 from opposite side (position Y), followed
by the other poppet 27, spring 26 and dash pot 25. Fit ‘O’
ring 24 and plug 23, tightened to specified torque setting.
Install poppet 22, spring 21, ‘O’ ring 20 and plug 19 at
position Z. Tighten plug to specified torque setting.
With the seal grooves in flange 2 facing upwards, install
seals and back-up rings 4 to 8 as shown at F. Make sure
that these seals and seal 14 are securely held using
petroleum jelly.
Position rotor 13 with splined side facing upwards as
shown.
Align all match marks made before dismantling.
Note: The shuttle flow hole A on the underside of flange 2
and holes B, C, D and E must all be aligned. Do not
confuse hole A with case drain hole X.
Make sure that check balls 12 are fitted in the seats in rotor
13.
When inverting and fitting flange 2, make sure that the
seals are not dislodged.
Lubricate cap screws 1 with hydraulic fluid before fitting.
Tighten to stage 1 torque setting in the sequence 1 to 9 as
illustrated K
Fig 71. ( T E-83). Tighten to stage 2 torque
following the same sequence.
Table 19. Torque Settings
Item 11: Check seal diameter for excessive wear.
Item 13: a) Check pockets for any signs of excessive
wear from roller contact.
b) Check star profile for any excessive or
irregular wear.
c) Check internal splines for any sign of
excessive wear. Spline teeth should not
show any signs of spalling or chipping.
d) Check outer diameter of rollers for any
sign of excessive wear or spalling.
Item 15: Check mating surface with item 13 for any
unusual wear marks
Item Nm kgf m lbf ft
1 (stage 1) 61-75 6.2-7.6 45-55
1 (stage 2) 75-88 7.6-8.9 55-65
19 23-29 2.3-2.9 17-21
23 37-45 3.7-4.5 27-33
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