Toro Reelmaster 335-D, Service Manual

Page: 121 / 254

5. Carefully remove valve plates from center section. It
may be necessary to pry valve plates off with a small
screwdriver.
6. Remove valve plate pins from center section.
7. Lay each pump section on its side and remove
cylinder block assembly from housing.
8. Remove the slipper guide and piston assemblies from
cylinder blocks.
9. Use an o-ring pick or wire to remove thrust plates from
swashplate and housing.
10. Remove shaft seal carrier. (See Tandem Pump
Shaft Seal Replacement.)
11. Slide drive shaft and bearing assembly from hous­
ing.
12. Remove retaining ring and press shaft out of
bearing.
13. Remove hex tapping screws retaining trunnion seal
cover and trunnion cover to housing. Mark position of
covers for reassembly.
14. The trunnion seal cover assembly includes an
o-ring, lip seal and trunnion bearing on the control side.
The trunnion cover assembly includes an o-ring and
trunnion bearing on the side opposite the control. Re­
move these parts from the housing. (See Trunnion Seal
Replacement).
15. Remove swashplate bearings, spacers and shims
from housing and swashplate. The bearing assemblies
are a slip fit in the housing.
16. Tilt and lift swashplate from housing.
Inspection and Replacement of Parts
17. After disassembly, thoroughly clean all parts in a
suitable solvent. Replace all o-rings, gaskets and seals.
18. Inspect all parts for damage, nicks or unusual wear
patterns. Replace all parts having unusual or excessive
wear or discoloration.
19. If scratches, which can be felt with a pencil lead, can
be found on bronze surface of valve plates or running
surface of cylinder blocks, polish or replace the parts.
20. Inspect needle bearings and drive coupling in center
section. If replacement is necessary, remove shaft nee­
dle bearings using a suitable puller. Do not damage
valve plate surface of center section.
21. Press new needle bearings into center section using
a suitable press pin. When installed correctly, bearing
cage will protrude from 0.08 to 0.10 in. from surface of
center section to serve as pilots for valve plates.
IMPORTANT: When installing the needle bearing,
the printed (numbered) end of the bearing cage
must face the press pin.
22. Install drive coupling into center section. Install
second needle bearing into center section, following
procedure outlined above in step 21.
23. Install a new cylinder block kit if brass slippers on
pistons are scored or excessively rounded at edges.
Reelmaster
®
335-D Page 4 - 41 Sundstrand Tandem Pump Repairs