Charge Pump
1. Park the machine on a level surface, lower cutting
units, engage parking brake and stop the engine.
2. Remove the two (2) cap screws retaining the charge
pump cover. Remove the charge pump (Fig. 37, 38).
3. Remove geroter drive pin from the groove in the shaft.
4. Remove the geroter assembly from the charge pump
c
over. Remove the shaft seal from the cover.
5. Each part should be inspected separately if they are
to be reused. If either of the geroter assembly parts
needs to be replaced, they should both be replaced.
Always replace the o-ring.
6. Inspect the shaft bearing
in the charge pump cover
for wear or damage. If replacement is necessary, re-
move the needle bearing from the cover using a suitable
puller. Press a new needle bearing into the cover using
a suitable press pin. When installed correctly, the bear-
ing cage will be flush to 0.02 in. below the surface of the
seal counterbore in the front of the cover.
IMPORTANT: When inst
alling the needle bearing,
the printed (numbered) end of the bearing cage
must face the press pin.
7. Install the ger
oter drive pin in the groove in the drive
shaft, and retain with petroleum jelly.
8. Before assembly, lubricate the geroter assembly with
clean hydraulic oil. Install the geroter assembly into the
charge pump cover. Install the o-ring and retain with
petroleum jelly.
IMPORTANT: Correct
charge pump installation to
match engine rotation is determined by the position
of the charge pump cover on the transmission hous-
ing. To prevent damage to transmission from lack
of replenishing oil from charge pump, the flat on the
charge pump cover must be on the right (toward the
heat exchanger ports).
9. With the flat on the charge pump cover to the right,
i
nstall the charge pump assembly over the drive shaft
and onto the transmission housing. Make sure the gero-
ter engages the drive pin in the shaft.
10. Tighten the charge pump cover cap screws to a
t
orque of 27 to 37 ft-lb.
11. Install a new shaft seal (see Shaft Seal Replace-
ment).
12. Before starting the engine, check the oil level in
differential housing and add the correct oil as necessary.
Start the engine and let it run for one to two minutes,
then turn the engine off and check the oil level again.
Check the transmission for leaks.
1
2
Figure 37
1. Drive shaft 2. Charge pump
3
2
5
4
1
6
l
7
8
O
Install cover with f at
to right as shown
Figure 38
1. Charge pump cover 5. O-ring
2. Drive pin 6. Needle bearing
3. Pump shaft 7. Shaft seal
4. Geroter assembly 8. Retaining ring
Transmission Repairs Page 4 - 42 Reelmaster
®
5100-D
To Next Page
Loading...
