Chevrolet 70 1969 Series, Shop Manual

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STEERING SYSTEM 9B-32
QUICK REFERENCE TROUBLE SHOOTING CHART
N O T E : Some of the remedial procedures suggested for conditions out­
lined in this chart constitute overhaul of components which is not within the
scope of this manual. Refer to “ Overhaul" section of this manual for proper
method of accomplishing these corrections.
(Type 5 5 3 -D V and 5 6 8 -D V Pow er Steering)
HYDRAULIC PUMP
C O N D IT IO N
C A U S E R E M E D Y
1. Pum p Noise.
Loose belt.
Tighten belt.
Hoses touching otner parts of truck.
A d ju st hose position.
Low oil level.
Fill reservoir.
A ir in t ie oil.
Locate source of an leak and correct.
Excessive back p ressure caused by hoses or steer- Locate restriction and c o r r e c t .B le e d system .
mg gear.
Sco red p ressu re plaie.
Lap aw ay light scoring. R ep lace h e a vily scored part.
V an es not installed properly. Insta ll p roperly.
Extrem e w ea r of purnp ring.
Rep lace ring.
V an es sticking in rotor slots. Free up by rem o ving burrs or dirt.
Face of th ru st plate scored.
Lap aw ay light scoring. Replace h e a vily scored part.
S co red rotor. Lap aw ay light scoring. R ep lace h eavily scored part.
D etective flow control plunger. R ep lace assem b ly.
2. Le a k s at top of R eservo ir too full. Fill to proper level.
of reservoir.
A ir in the oil. Locate source of air leak and correct.
3. Le a k s at the
O-Ririg seal cut. Rep lace 0-R ing seal.
reservo ir.
0-R ing m p ro p erly installed. Install seal p roperly.
4. Le a k s at the Not tightened sufficiently. Torque to 30-40 ft.-lbs.
pressure fitting
Cross thread ed or dam aged seat.
R ep lace dam aged part.
or m ounting stud.
D efective seat on hose end. Rep lace hose.
D am aged seals. R ep lace seals.
5. Le a k s at the shaft D efective seal. R ep lace seal.
seal.
D am aged shaft. R ep lace shaft.
6. L e a k s in m etal
Poor casting. R ep lace d efective parts.
parts.
7. Pum p inoperative,
Loose d rive belt.
Tighten belt.
poor, or no assist.
L ow oi! level.
Fill reservoir to proper level.
A ir in the oil.
Locate source of air leak and correct.
D efective hoses or steerin g gear as d eterm ined Correct.
by test ou tlined und er gear section later in this
chart.
Flow control v a lve stuck.
Rem ove burrs or dirt.
Loose nut in end of flow control valve.
lig h te n nut.
P re s s u re p late not flat against ring.
C orre ct condition.
Ex trem e w e a r of pum p ring.
R ep la ce pum p ring.
S co red p ressu re plate, th ru st p late, and/or rotor.
Lap aw ay light scoring. Rep lace h e a vily scored parts.
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L