Dismantling and Assembly
Bolt on Auxiliary Spool Section
Body and Spool
The numerical sequence shown on the illustration is intended
as a guide to dismantling.
Two dismantling sequences are shown:
Components prefixed
A
- inlet section, valve body and non-
return valve.
Components prefixed
B
- valve spool components.
The valve spool components can be dismantled and
assembled with the valve body
5A
still assembled to the
loader valve
E
if required.
For assembly the sequence should be reversed.
The following points MUST be avoided when dismantling
and assembling the valve:
•
CONTAMINATION
•
DAMAGE TO SPOOL
•
DAMAGE TO SEAL GROOVES
All or any of the above points may result in possible
problems with the valve.
For dismantling and assembly of the auxiliary relief valves
1C
, see
Bolt on Auxiliary Spool Section - Auxiliary Relief
Valves
.
When Dismantling
When removing 'O' rings and seals, use an appropriately
rounded tool that WILL NOT cause any damage to the spool
or seal grooves.
When dismantling the spool hold a rod through the eye end
of the spool to prevent it rotating when undoing the screw at
the opposite end.
Inspection
Inspect the valve components for signs of scratches, nicks
or any other type of damage. Renew damaged components
as required.
When Assembling
Renew 'O' ring seals
4A
,
8A
, and
2C
. Make sure the 'O' ring
seals are not trapped or damaged.
Renew wiper seals
8B
and
11B
, and spool seals
9B
and
12B
, note the correct seal orientation shown at
X
. When
fitting seals
9B
and
12B
make sure they are square to the
valve body.
50 - 25
Section E
9803/3280
Section E
50 - 25
Issue 1
Loader Valve - Fixed Flow
Torque Settings
Item
Nm
kgf m
lbf ft
1A
19
1.9
14
2A
45
4.6
33
1B, 3B
8 - 11
0.8 - 1.1
6 - 8
1C
40 - 49
4 - 5
30 - 36
