Maintenance; Relief Valve - Cub Cadet 8354 Service Manual

15.2 MAINTENANCE

Housing Bore (Depth of Scratch)
1. Check if scratch occurred by gear in the surface of
housing.
2. If scratched more than half of inside housing surface,
the replace pump assembly.
3. Measure housing I.D. of inside surface without
scratch and measure housing I.D. with scratch.
4. If the value obtained from both measurements ex-
ceeds the allowable limit, replace the hydraulic
pump.
(Ref.)
Use cylinder gauge to measure housing I.D.
Depth of Allowable
Scratch Limit

15.3 RELIEF VALVE

A. DISASSEMBLY, ASSEMBLY
a . Relief Valve Disassembly
1. Disengage plug (1) and pull out spring (5) and pop-
pet (6).
2. Pull out valve seat (7).
(When reassembling)
Make sure the O-ring is not damaged.
Tightening Relief valve
torque
IMPORTANT:
• After disassembling or assembling the relief valve,
always adjust the setting pressure of the relief valve.
1. Disengage joint bolt (9) and install the pressure
gauge.
2. Start the engine and set it to max. speed.
3. Until relief valve is operated, move position lever
and read gage.
4. If the pressure is out of reference, disengage the
plug of hydraulic block (7) and adjust the adjusting
shim.
[See figure]
Relief
Reference
valve
pressure
setting
pressure
D615-W03 May-2003
K&T Saw Shop 606-678-9623 or 606-561-4983
www.mymowerparts.com
0.09 mm
0.0035 in.
49.0 ~ 68.6 N·m
5.0 ~ 7.0 kgf·m
36.2 ~ 5.06 lbf·ft
16.2 ~ 17.2 Mpa
165 ~ 176 kgf cm 2
2347 ~ 2489 psi
HYDRAULIC SYSTEM
(1) Gear Pump
(2) Suction Pipe
(1) Plug
(2) Adjusting Shim
(3) Adjusting Shim
(4) Hydraulic Block Body
(5) Spring (10) Hydraulic Pipe
615W928B
(3) Hydraulic pipe
(4) hydraulic pipe
615W929A
(6) Poppet
(7) Valve Seat
(8) O-Ring
(9) Joint Bolt
9-27