Cadillac 60 Series 1963 Shop Manual page 63

5-4
POWER STEERING
b. Start engine, and running at fast idle, r e -
check fluid level. Add fluid if necessary to "Add"
mark on dipstick.
c. Bleed system by turning wheels from side
to side without hitting stops. Maintain fluid level
just above internal pump casting. Fluid with air
in it will have a light tan appearance. This air
must be eliminated from fluid before normal
steering action can be obtained.
d. Return wheels to center position and continue
to run engine for two or three minutes, then shut
engine off.
e. Road test car to make sure steering functions
normally and is free from noise.
f. Recheck fluid level as described in Steps 1
and 2, making sure fluid level is at " F u l l " mark
on dipstick.
2. Checking Pump Pressure
1. Disconnect pressure hose at high pressure
fitting on rear of pump. Have a container ready
to catch dripping oil.
2. Connect gear end of an extra pressure hose
to adapter, J-7786, on Gage Valve Assembly,
J-5176-01, and other end to high pressure fitting
on rear of pump, Fig. 5-5.
3. Install a 3/8 inch male pipe to 3/8 inch in-
verted flare union on valve side of gage and con-
nect pressure hose to flare union.
4. Open gage valve, start engine, and run at
idle.
5. With car weight on front wheels, turn steer-
ing wheel slowly against right or left stop. Hold
wheel against either stop to obtain maximum
pressure reading. Pressure gage should read
Satisfactory Range
1150 to 1250 PSI
Gage Valve
Assembly J-5176-01
Fig. 5-5 Checking Pump Pressure
not less than 1100 psi. If pressure will not reach
1100 psi, it indicates internal leaks in the gear or
a defective pump.
CAUTION: Never hold wheels against stops
for more than 5 seconds.
6. To determine which unit is at fault, check
pump output separately by slowly closing gage
valve. When pressure peaks on gage, note reading
and quickly open gage valve. Pressure reading
should come up between 1100 and 1200 psi when
valve is closed and between 1250 and 1275 psi
on Seventy-Five series cars and Commercial
Chassis.
CAUTION: Do not leave gage valve closed
for more than 5 seconds or damage to pump
cam ring may result.
7. If reading does not reach 1100 psi, pump
needs servicing.
8. If pressure rises with valve closed, pump
is functioning properly, and fault is in steering
gear or lines.
9. Shut off engine, remove pressure testing
equipment and reconnect pressure hose to pump.
3. Steering Pump Belt Adjustment
1. Place Belt Tensioner Gage, J-7316, on pump
belt mid-way between pulleys.
2. Check gage reading. Reading should be 70
pounds on a used belt, and 100 pounds on a new
belt. Reset tension to 70 pounds if gage reading
is less than 55 pounds.
3. If belt tension is incorrect, loosen two bolts
securing pump mounting bracket to engine.
4. Move pump outward by hand to attain proper
belt tension by placing right hand on the filler
neck and pulling pump toward fender. When ad-
justing a used belt, tighten belt to a tension of
70 pounds, (100 pounds for a new belt). Do not
use a prybar to move the pump as it will damage
pump reservoir.
5. Tighten pump mounting bracket bolts to 35
foot-pounds.
4. Checking Steering Gear
Adjustments (On Car)
When steering gear is thought to be out of ad-
justment, a quick check can be made by moving
steering wheel back and forth with short slow
motions at the "on-center" position with engine
off. Excessive looseness felt or heard indicates
that either the pitman shaft or the thrust bearing
requires adjustment. These adjustments can be
made on car by following this procedure: