B - Ardiehl.de

HYDRAULIC CONTROL VALVE (Cont’d)
H Port – Auxiliary Section
Loosen the plug (Item 1) [A].
Assembly: Tighten the plug to 35–40 ft.–lbs. (47–54 Nm)
torque.
Remove the plug from the control valve [B].
Replace the O–ring.
Depending on the application of the auxiliaries, the control
valve may be equipped with a port relief valve (H port).
Remove the port relief valve (Item 1) [C].
Assembly: Replace the O–rings and backup washers.
Tighten the port relief valve to 35–40 ft.–lbs. (47–54 Nm)
torque.
Base End Restrictor
Remove the adapter fitting (Item 1) [D] and remove the
restrictor (Item 2) [D].
Inspection
Check the spools for wear or scratches.
Check that the spools are not loose in their bore.
Check that the centering springs are not broken.
Check that the load check valve seats are not worn.
Check the load check poppets for damage.
Check the rubber boots and retainers that they are not
worn or damaged.
Replace the parts as needed.
A
B
C
D
1
1
2
1
CD–15085
CD–15063
CD–15064
CD–15065
853, 853H BICS Loader
–2–43– Service Manual