Dodge ram truck 3500 1996 Service Manual page 1370

19 - 4 STEERING B R
DIAGNOSIS AND TESTING (Continued)
(3) Connect pressure gauge from Power Steering
Analyzer Tool k i t 6815 to both hoses using appropri­
ate adapter. Connect spare pressure hose to gear or
pump.
(4) Open the test valve completely.
(5) Start engine and let idle long enough to circu­
late power steering fluid through flow/pressure test
gauge and to get air out of the fluid. Then shut off
engine.
(6) Check fluid level, add fluid as necessary. Start
engine again and let idle.
(7) Gauge should read below 1034 kPa (150 psi), i f
above, inspect the hoses for restrictions and repair as
necessary. The initial pressure reading should be in
the range of 345-552 kPa (50-80 psi). The flow meter
should read between 1.3 and 1.9 GPM.
CAUTION; The following test procedure involves
testing maximum pump pressure output and flow
control valve operation. Do not leave valve closed
for more than five seconds as the pump could be
damaged.
(8) Close valve fully three times and record high­
est pressure indicated each time. A l l three read­
ings must he above specifications and w i t h i n
345 k P a (50 psi) of each other.
• Pressures above specifications but not within
345 kPa (50 psi) of each other, replace pump.
• Pressures within 345 kPa (50 psi) of each other
but below specifications, replace pump.
NOTE: Refer to pump relief pressure chart,
CAUTION: Do not force the pump to operate
against the stops for more than 2 to 4 seconds at a
time because, pump damage will result.
(9) Open the test valve, turn steering wheel
extreme left and right positions against the stops.
Record the highest indicated pressure at each posi­
tion. Compare readings to specifications chart. I f
highest output pressures are not the same against
either stop, the gear is leaking internally and must
be repaired.
PUMP SPECIFICATION CHART
ENGINE
RELIEF PRESSURE
(P.S.I.)
FLOW
(G.P.M.)
3.9L
1400 to 1500 2.4 to 2.8
5.2L
1400 to 1500 2.4 to 2.8
5.9L
1400 to 1500 2.7 to 3.1
8.0L
1450 to 1550 3.1 to 3.5
5.9L Diesel
1400 to 1500 2.7 to 3.1
PUMP LEAKAGE DIAGNOSIS
S E R V I C E P R O C E D U R E S
POWER STEERING PUMP—INITIAL OPERATION
CAUTION: The fluid level should be checked with
engine off to prevent injury from moving compo­
nents. Use MOPAR Power Steering Fluid or equiva­
lent. Do not use automatic transmission fluid and
do not overfill.
Wipe filler cap clean, then check the fluid level.
The dipstick should indicate C O L D when the fluid is
at normal temperature.
(1) Fill the pump fluid reservoir to the proper level
and let the fluid settle for at least two (2) minutes.
(2) Start the engine and let run for a few seconds
then turn engine off.
(3) Add fluid i f necessary. Repeat the above proce­
dure until the fluid level remains constant after run­
ning the engine.
(4) Raise the front wheels off the ground.
(5) Slowly turn the steering wheel right and left,
lightly contacting the wheel stops at least 20 times.
(6) Check the fluid level add i f necessary.
(7) Lower the vehicle, start the engine and turn
the steering wheel slowly from lock to lock.
(8) Stop the engine and check the fluid level and
refill as required.
(9) I f the fluid is extremely foamy, allow the vehi­
cle to stand a few minutes and repeat the procedure.
R E M O V A L A N D I N S T A L L A T I O N
POWER STEERING PUMP—GASOLINE ENGINE
WARNING: DO NOT REMOVE THE WATER PUMP
COOLANT TUBE UNLESS THE COOLANT SYSTEM
HAS BEEN DEPRESSURIZED AND DRAINED.
REMOVAL
(1) Remove the serpentine drive belt, refer to
Group 7 Cooling.
(2) Remove the hoses from the power steering
pump and cap the fittings.
(3) Remove battery ground cable and unthread
stud from cylinder head, do not remove from bracket.
(4) Loosen upper bracket bolt and remove the
lower bracket to engine block bolts.
(5) Pivot the pump assembly past the coolant tube.
(6) Remove the upper stud and remove upper bolt
from cylinder head.
(7) Remove steering pump and mounting bracket
from engine as an assembly.