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
Hydraulics
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
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