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Repair
Refer to Parts Drawing on page 15 unless otherwise
specified.
•
Spool valve Repair Kit 220457 is available to
replace the gaskets (29), spring retaining plugs (31),
springs (21), spool (38), trip rod (33) and piston stop
(37). The spool, plugs, and springs must be
replaced as a group.
•
Clean all parts as you disassemble them, and
inspect for wear or damage. Replace parts as
necessary. Use Loctite
equivalent, when thread sealant is specified.
•
Pump Repair Kit 236862 is available to replace the
gasket (29), o-rings (11, 12, 105 and 108) seals (17),
packing (107), and piston rings (15).
Disassembly
Refer to Parts Drawing on page 15 unless otherwise
specified.
To avoid serious injury, do not move this unit without
the use of lifting equipment. Keep the hoist attached
for steps 1 through 15.
1. Relieve the pressure (page 8), and stop the pump at
the bottom of its stroke.
NOTICE
Avoid getting dust or dirt in the motor during repair.
Cleanliness is essential when repairing a hydraulic
motor. Foreign particles like dust or dirt in the
hydraulic fluid can increase friction between moving
parts and increase component wear.
2. Disconnect the displacement pump hoses.
Disconnect the hydraulic hoses and plug all
hydraulic connections and lines to prevent
contamination.
308391P
®
TL-242 thread sealant, or
3. Place the hydraulic motor horizontally in a bench
vise at the pump adapter (42) and bottom cylinder
cap (43).
4. Remove the displacement pump with a strap
wrench.
5. Remove the cap screws (25) and the mounting
plate (46).
6. Remove the hydraulic motor from the vise.
7. Place the piston (110) flats in the vise.
8. Loosen, but do not remove piston (44a) with a
wrench.
9. Remove the piston (110) flats from the vise.
10. Place the motor vertically in the vise at the pump
adapter (42) and the bottom cylinder cap (43).
11. Remove the piston (110), ball (103), and seal (107).
NOTICE
To prevent damage to the spool (38) and the upper
housing (36), remove the detent parts (31, 21, 29, 30,
and 7) before removing the end cap (40).
The socket screw (9), cap screws (22), and retainer
(44b) are fastened with Loctite
used sparingly to soften the adhesive during
disassembly.
12. Remove one detent assembly retaining plug (31),
spring (21), gasket (29), ball guide (30), and ball (7).
If the ball or other parts stick in the upper housing
(36), use a magnet to extract the parts. Do not allow
the parts to fall into the motor. Repeat the
procedure for the other detent assembly.
13. Unscrew the top and bottom flare nuts on the
hydraulic tube (49), and remove the tube. Allow the
oil to drain from the motor into a pan.
14. Remove the socket screws (9), and remove the end
cap (40).
15. Remove the bolts (23), but do not remove the rods
(47).
Repair
®
TL-242. Heat may be
11
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