215204 Rev. 1 21
ROUBLESHOOTING
T
4.4 Sideshift Function
There are five potential problems that could affect the
sideshift function:
• Incorrect load handling. Refer to the Operator’s Guide
for suggested procedures.
• Incorrect hydraulic pressure or flow from the lift truck.
• External leaks.
• Defective solenoid coil or valve (if equipped).
• Worn/defective cartridge valves or cylinder seals.
4.4-1 Supply Circuit Test
1 Check the pressure supplied by the truck at the carriage
hose terminal. Pressure must be within the range shown
in Specifications, Section 6.1. PRESSURE TO THE
CLAMP MUST NOT EXCEED 2600 PSI (180 bar).
2 Check the flow volume at the carriage hose terminal.
Flow must be within the range shown in Specifications,
Section 6.1.
3 Sideshift left or right fully, holding the lever in the
SIDESHIFT position for a few seconds. Release the lever
and check for external leaks at fittings, hoses, valve and
manifold.
WARNING: Before removing hydraulic
lines or components, relieve pressure in
the hydraulic system. Turn the truck off
and open the truck auxiliary control valves
several times in both directions.
CL0478.ill
Flow Meter
2
Back View
CL0421.ill
SIDESHIFTING VALVE
WITH REGENERATION
SIDESHIFTING VALVENON-SIDESHIFTING VALVE
CLAMP
Check
TEST
port
F
Flow
Divider
Flow
Divider
CLAMP
Relief
Flow
Divider
2
5
5 Release the lever and watch the pressure gauge:
• If the pressure drop is less than 150 psi (10 bar)
initially, and additional drop does not exceed 25 psi
(1.7 bar) per minute, the problem is not hydraulic
(see Section 4.1-3).
• If the pressure drop is more than 150 psi (10 bar)
initially, and additional drop exceeds 25 psi (1.7
bar) per minute, the CLAMP check valve cartridge
may be faulty. Replace the cartridge.
CLAMP
Check
CLAMP
Relief
CLAMP
Relief
6 Close the arms fully and hold the lever in the CLAMP
position for a few seconds. If the pressure still drops as
before, the cylinders are faulty and must be serviced
(see Section 5.4).
CLAMP
Check
2
To Next Page
Loading...