A Spool Is Sticking; Leaking Oil Seal (Control Valves); Ram Creep - jcb 214e Service Manual

www.WorkshopManuals.co.uk
Section E
15 - 3
Fault

A spool is sticking.

5
6

Leaking Oil Seal (Control Valves)

7

Ram creep.

Note: Refer also to Service Procedures, Ram Creep Tests - All Services
9803/3280
Hydraulics
Fault Finding
Probable Cause
Oil temperature abnormally high.
The hydraulic fluid is dirty.
The service pipe connection
is over tightened.
The valve housing was twisted
during installation.
Pressure too high.
A control linkage is bent
A spool is bent
A return spring is broken.
A return spring or cap is out of
alignment.
Temperature distribution within
control valve not uniform.
Paint or dirt on the seal face.
The back pressure in the valve
circuit is excessively high.
Spool damaged.
The seal is not secured.
The seal is cut or damaged.
Associated ram or pipe lines from
ram leaking.
Check valve malfunctioning
(if fitted, e.g. stabiliser circuit)
Associated valve section spools
leaking.
Associated ARV leaking
Purchased from www.WorkshopManuals.co.uk
Action
Check for correct fluid, see Lubricants
and Capacities. Check oil cooler and
grille for blockage.
Clean the tank strainer. If strainer badly
clogged, drain and flush hydraulic system
Fill with clean hydraulic fluid.
Check tightening torque.
Loosen retaining bolts and tighten to
correct torque figures.
Check system pressure.
Disconnect the linkage. Repair the
linkage if possible, or fit a new one
Dismantle the control valve. Renew spool
as necessary.
Renew as necessary.
Remove the cap, check that the spring is
in the correct position. Refit cap and
torque tighten bolts
Warm the entire system up before
using service.
Remove the seal and clean.
Check circuit pressures, adjust if
possible. Otherwise investigate
thoroughly.
Dismantle. Inspect all parts. Renovate or
renew as necessary.
Clean the seal and tighten the retaining
bolts to the correct torque.
Fit a new seal.
Check and rectify as required.
Test check valve, rectify as required.
Rectify, check for contamination.
Rectify, check for contamination
Section E
15 - 3
.
Issue 1