Cub Cadet 8404 User Manual
Page 260
CHAPTER 9 8354/8404
9-26
D615-W02 May-2003
615W927A
B. Disassembly and Assembly of Gear Pump
(1) Snap Ring
(2) Bearing
(3) Cover (Front)
(4) Seal Ring
(5) Pin
(6) 1st Pump
(7) Seal Ring
(8) Seal Ring
(9) Bushing
(10) Drive Gear Shaft 1
(11) Passive Gear 1
(12) Coupling
(13) Cover
(14) Seal Ring
(15) Seal Ring
(16) Bushing
(17) Drive Gear Shaft 2
(18) Passive Gear
(19) Seal Ring
(20) 2nd Pump
(21) Cover
(22) Spring Washer
(23) Bolt
1. Place the gear pump assembly into a vice.
2. Loosen blot (23) 4-point and disassemble rear cover
(21).
3. Disassemble snap ring (1) and bearing (2) from
the drive shaft.
4. Disassemble Second pump (2) and then bushing
(16), sealing (14, 15), O-ring (10), drive gear shaft 2
(17) and driven motion gear (18).
5. Disassemble cover (13) and coupling (12).
6. Disassemble First pump (6) and then bushing (9),
sealing (7, 8), O-ring (4), drive gear shaft 1 (10) and
driven motion gear (11).
7. Disassemble oil seal attached to cover (front) (3).
•
If oil seal is cracked or aged, replace
it with a new part.
•
If the seal ring is damaged, replace it
with a new one.
•
Make sure the assembly direction of
seal ring is correct.
CAUTION
(When reassembling)
•
Assemble the drive gear as in the original direction.
•
When assembling bush (9, 16), reassemble each
in the original position.
•
Make sure seal ring and O-ring are not damaged.
•
After reassembling hydraulic pump assembly, in-
stall long arm of about 100 mm (3.39 in.) to verify
soft rotation.
Hydraulic Pump Trial Operation
After assembly, perform a trial operation as follows
and check the pump for normal operation. If pump tem-
perature is raised excessively, perform an inspection
again.
1. Assemble the hydraulic pump into tractor and tighten
the intake pipe and hydraulic pipe.
2. Set the engine speed to between 1300 and 1500
rpm and run hydraulic pump for 10 minutes without
load.
3. Set the engine speed to between 2000 and 2200
rpm and run the hydraulic pump for about 15 min-
utes under the pressure between 30 and 50 kgf/
cm
2
.
4. Set engine to max. speed and then run relief valve
five times for 25 seconds (once per 5 seconds).