Flow Control Valve; Removing Retaining Ring; Pump - Pontiac Grand Prix Service Manual

STEERING B-47
3. Using pressure gage J 5176-1, adapter fitting J
22326, connect gage to both hoses.
4. Open hand valve on gage.
5. Start engine, allow system to reach operating
temperatures and check fluid level adding any fluid if
required.
6. Turn steering wheel slowly to left or right until
wheel is at full turn position. Holding wheel in this
position, read pressure on gage, pressure should be at
least 1100 psi on all Tempest models; 1250 psi on
Pontiac Catalina models without air conditioning and
all Firebird models; 1200 psi on all other Pontiac and
Grand Prix models except Pontiac Catalina models
without
air
conditioning. If pressure does not reach
specification, there is either internal leakage in steering
gear or pump is malfunctioning.
NOTE: Vehicle's
pant
wheel must be on ground and
supporting weight of vehicle. Do not hold steering wheel
at full turn for over 5 seconds, this will prevent damage
to pump.
7. To determine which problem exists, slowly close
hand valve on gage, pressure should read 1100 to 1200
psi on all Tempest models; 1250 to 1350 psi on Pontiac
Catalina models without air conditioning and all
Firebird models; 1200 to 1300 psi on all other Pontiac
and Grand Prix models except Pontiac Catalina
models without air condition..
NOTE: Do not hold hand valve on gage closed for over
5 seconds during this test to prevent damage to pump.
8.
If pressure does not reach specifications in step 7,
pump is malfunctioning.
9. If pressure is within specifications in step 7, problem
is
due to internal leakage in steering gear.
10. Shut off engine, remove testing gage, spare hose,
reconnect pressure, check fluid level or make needed
repairs.
MINOR SERVICE
FLOW CONTROL VALVE
.
REPLACE (WITHOUT REMOVING PUMP FROM
CAR)
1. D i s c o ~ e c t pressure hose from pump union and
drain oil.
2. Remove union from pump.
3. Using a magnet, withdraw flow control valve then
spring from pump.
Fig. 9-84 Removing Retaining Ring
4. Install valve by reversing above steps, be sure that
O-ring seal on union is replaced and flow control valve
is
installed in the proper direction.
,
MAJOR SERVICE
0
PUMP
REMOVE
Disconnect hoses at pump. When hoses are
disconnected, secure ends in raised position to prevent
drainage of oil.
2.
Install two caps at pump fittings to prevent drainage
of oil from pump.
3. Remove drive pulley attaching nut.
4. Loosen bracket to pump mounting bolts.
5.
Remove pump belt.
6. Slide pulley from shaft. Do not hammer on rim of
pulley as this will damage pulley or pump.
7. Remove bracket to pump bolts.
8.
Drain pump of oil.
9. Clean exterior of pump.
PUMP
DISASSEMBLE
CA
UTION: In clamping pump in vise. be careful not to
exert excessive force on fiont hub of pump as this
m y
&tori bwhing.