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TM 5-4210-220-12
4-25. STEERING SYSTEM - Continued
4-25.3 Power Steering Pump-Continued
REPAIR
a.
Drive Belt Repair
NOTE
Replace drive belts in matched pairs
only. Uneven belt wear and short
service life will result if belts are
replaced individually or in unmatched
pairs.
(1)
Loosen screws (5 and 6). Push pump (4) toward
engine pulley and remove old belts (7).
(2)
Install new belts and tension by levering pump
(4) away from engine pulley. Tighten screws (5
and 6).
(3)
Check belt tension. A firm push with the thumb
midway between engine and pump pulley should
deflect each belt approximately 0.05 inches (1.27
mm). Adjust pump position as necessary.
b.
Pressure Relief Valve Repair
CAUTION
Do not repair relief valve (5). If faulty,
the relief valve must be replaced. Valve
malfunction
and
potential
pump
destruction may occur if disassembly is
attempted.
NOTE
Pressure relief valve may be replaced
without removing steering pump from
truck.
(1)
Remove plug (1), plug (3), and spring (4).
(2)
Insert a suitable tool through the bore where plug
(1) is removed and push relief valve (5) out of
valve cover
NOTE
Retaining ring (2) can remain in valve
cover unless it is damaged. If removed,
be careful not to scratch valve bore.
Change 1 4-478
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