SkyTrak 6036 Service Manual - Manual (Page 171)

Model 6036 S/N 9B0499 and Before 9-58
Section 9. Hydraulic System
9.3.7 Pressure Reducing Valve
a. Removal
NOTE: On forklifts with S/N 8F0235 and before,
refer to paragraph 9.3.8 and remove counterbal-
ance valve before you begin.
1. Engage the park lock, place the travel selector
lever in neutral, and stop the engine.
2. Slowly loosen the fittings at the pressure
reducing valve as required to relieve any
trapped pressure.
3. Tag and disconnect hydraulic hoses and tube
assemblies (16 and 17, Fig. 9.33) from run
tees (11 and 12) on pressure reducing valve
(4).
4. Remove two hex nuts (21), lock washers (19)
and capscrews (18) to detach pressure
reducing valve (4) from valve mounting plate
(30).
5. Remove hydraulic fittings from valve as
required.
3. Tag and disconnect tube assembly (16) from
connector (13).
4. Remove two hex nuts (21), lock washers (19),
flat washers (20) and socket head capscrews
(28) to detach the relief valve.
5. Remove hydraulic fittings from valve as
required.
b. Disassembly
NOTE: There are no serviceable parts in the relief
valve; do not disassemble.
Remove steering relief valve cartridge (Fig. 9.35).
c. Cleaning
Clean metal parts of valve in an approved cleaning
solvent and blow dry.
d. Inspection and Replacement
1. Inspect valve cartridge (Fig. 9.35) for wear,
scoring, damaged seals and other damage.
Replace cartridge if damaged.
2. Discard entire steer relief valve if damaged.
e. Installation
1. Install connector (13, Fig. 9.33) and branch
tee (14) on relief valve (5).
2. Position the relief valve on valve mounting
plate (30) and secure with two capscrews (28),
flat washers (20), lock washers (19) and hex
nuts (21).
3. Connect tube assembly (16) to connector (13).
4. Connect hydraulic hoses to branch tee (14)
and connector (13).
f. Bleeding Steering System
1. Start the forklift engine and run at idle.
2. Turn the steering wheel fully left to right and
back (lock to lock) several times in all three
steering modes until they operate smoothly.
This should purge the steering system of air.
3. Shut down the engine. Check the hydraulic oil
level and fill as described in the Owners/
Operators Manual.
Warning !
Fig. 9.35 Valve Cartridge for Pressure Relief Valve
Before starting the engine be sure all hydraulic
connections are tight and all tools are removed
from the forklift.
Warning !
BODY
CARTRIDGE WITH SEALS
Relieve hydraulic pressure before servicing any
hydraulic component. Escaping hydraulic fluid
under pressure can penetrate the skin causing
serious injury.
Warning !
Wait for the hydraulic fluid to cool before servic-
ing any hydraulic component. Hot hydraulic fluid
can cause severe burns.
MA0761