Troubleshooting

Troubleshooting

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Troubleshooting Guide

 

Symptom Potential cause Solution
Oil leaking from gear box
output shaft
Damaged shaft seal. Replace seal and shaft if
necessary.
Fluid leaking out of
reservoir or foaming
Clogged oil filter Change fluid and filter
Air in system Bleed system. Inspect suction side of supply pump for air leak
Poppetts of steering gear not adjusted properly causing high temperatures Adjust poppetts
Pump cavitating Inspect pump supply line
for restriction
Fluid overheating Inspect steering gear return
line for restriction
Hard turning in one or
both directions
Bind in steering column Inspect column drag
Dirt or debris trapped in piston relief Inspect piston relief
Bent or damaged king pins and tie rods Repair or replace king pins
and tie rods
Front end load too great Lighten load
Low fluid level in steering system Fill reservoir as needed
Air in system Bleed system and inspect for cause
Steering radius restricted Poppetts not adjusted
properly
Adjust poppetts
Hard steering Defective supply pump Inspect pump flow
Steering out of alignment Align front end
Fluid overheating Find and correct
overheating cause
High operating
temperature
Fluid flow restriction Inspect back pressure
Check maximum oil flow
Road wander/over
steering
Oil flow too high Pump not to specifications
Air trapped in gear Bleed system
Looseness worn front end
parts
Inspect and repair as
required
Front end alignment not
correct
Align front end
Overloaded Reduce loads
Rear axle not parallel Inspect and repair as
needed
Tight tie rod ends and drag link sockets Inspect rotational torque and replace as needed

Note: This procedure is for new and remanufactured gears from Power Steer Inc. or your vehicle manufacturer. All steering gears from Power Steer Inc. have had their poppett/plunger seats replaced and reset.

Caution: System must be flushed prior to installing new gear. This will ensure any debris or foreign matter that is in system does not damage your new gear.

 

bullet Inspect axle stop bolts to ensure they are set to vehicle manufactures wheel cut or
clearance specifications.
bullet Jack up front end so tires are off the ground
bullet Start engine and let it idle
bullet Turn steering wheel to full left until you contact axle stop. Pull hard on the wheel.
bullet Now turn full right until you contact axle stops. Pull hard on the steering wheel.
bullet Turn vehicle off

When replacing PUMP only :

 

bullet Lift front axle off the ground and support with axle stands. Be sure and block rear tires.
bullet Install pump. Do not reconnect return line from gear to reservoir, rather place hose into a five gallon bucket. Use a plug on reservoir to contain fluid.
bullet Select proper fluid as recommended for steering gear or linkage system. Note: A good rule of thumb is to use twice the amount of fluid as the capacity of entire system.
bullet
When possible, disconnect the ignition so the engine won’t start. An assistant is required to crank over the engine and to rotate steering wheel at same time.
Caution: Avoid hitting or holding against axle stop or damage will occur. At the same time fill reservoir with fluid and make attempt at not letting the pump run dry, this can be difficult at best. This allows the valve to open and the piston to force clean fluid through the pressure hose, valve, piston area and out of the return hose into five gallon container. Flush until clean fluid comes out.
bullet Now re-attach return line to reservoir, top off reservoir, re-connect ignition system start engine and move wheel to one side. Stop engine and re-inspect fluid.
Caution: Don not over fill!
bullet Start engine and turn steering wheel stop to stop approximately 6 times. Let run until system is at running temp and repeat turning steering wheel stop to stop six times.
Caution: Don not hold against axle stops. Note: Many steering systems have additional procedures for bleeding, may need to use manual bleed procedure. Determine gear type to see if has manual bleed screw to get any residual air out of system.
bullet
Start engine and turn steering wheel stop to stop approximately 6 times. Let run until system is at running temp and repeat turning steering wheel stop to stop six times.
Caution: Do not hold against axle stops. Note: Many steering systems have additional procedures for bleeding, may need to use manual bleed procedure. Determine gear type to see if has manual bleed
screw to get any residual air out of system.

When replacing GEAR only :

bullet Lift front axle off the ground and support with axle stands. Be sure and block rear tires.
bullet Install gear. Do not connect pressure and return hoses. Place pressure hose into five gallon container.
bullet Select proper fluid as recommended for steering gear or linkage system.
Note: A good rule of thumb is to use twice the amount of fluid as the capacity of entire system.
bullet
When possible, disconnect the ignition so the engine won’t start. An assistant is required to crank over the engine and to rotate steering wheel at same time. 
Caution: 
Avoid hitting or holding against axle stop or damage will occur. At the same time fill reservoir with fluid and make attempt at not letting the pump run dry, this can be difficult at best. This will allow the valve to open and the piston to force clean fluid through the pressure hose.
Flush until clean fluid comes out.
bullet Remove return hose from reservoir, clean with solvent and air blow dry. Reinstall.
bullet After re-connecting hoses, fill reservoir and crank over engine 5 seconds. Now turn steering wheel stop to stop without cranking engine. Top off reservoir.
bullet
Start engine and turn steering wheel stop to stop approximately 6 times. Let run until system is at running temp and repeat turning steering wheel stop to stop six times.
Caution: Do not hold against axle stops. Note: Many steering systems have additional procedures for bleeding, may need to use manual bleed procedure. Determine gear type to see if has manual bleed
screw to get any residual air out of system.
bullet Lower to ground and inspect fluid level.

Note: If this is a replacement steering gear, please follow the poppett/plunger adjustment procedure for automatic adjusting steering gears prior to bleeding system.

Caution: For Steps 1 and 2 do not turn steering wheel or air may be induced into system.

Step1 : Fill reservoir to nearly full. Crank the engine for 10 seconds without allowing it to start. If it does start, shut off immediately. Check and refill the reservoir. Repeat process at least three times, checking the reservoir each time.

Caution: Do not allow fluid to drop significantly or run out of reservoir as this may induce air into system.

Step2 : Start engine and let it idle for two minutes. Do not steer. Shut off engine and check the reservoir fluid level. Refill if necessary.

Step3 : Start the engine again. Steer the vehicle from full left to full right several times. Add fluid, as necessary to full line on dipstick.

Note: The above procedure should remove all air from steering system. If gear is mounted in an inverted position and is equipped with a manual bleed screw, commonly found with TRW/Ross steering gears, please continue to step 4.

Step4 : Follow the above procedure. Leave engine idling. With the steering gear in centered position, loosen the bleed screw about one turn (5/16 inch socket required for TRW/Ross, 1/8” allen wrench for Sheppard ). This allows the air and aerated fluid to “bleed out” around bleed screw until only clear (non aerated) fluid is present. Close bleed screw and check and fill reservoir if necessary. Torque manual bleed screw to
27-33 inch pounds.

Caution: Do not turn steering wheel with manual bleed screw loosened.

Bleeding the dual steering gear system is necessary whenever the system has been repaired. The bleeding procedure is the same no matter the gear sizes used.

bullet Raise the vehicle up until front wheels have cleared surface.
bullet Inspect fluid level in reservoir to ensure it is full. Continue filling after starting engine and during the bleed process to maintain correct fluid level.
Note: Do not allow reservoir to empty during this procedure as it can cause pump damage or further aeration.
bullet Remove drag links from both master and slave gears pitman arm following the procedure in vehicles service manual.
bullet Start engine and allow it to idle.
bullet Turn steering wheel to full left and hold until slave gear moves its full travel. Then turn full right and hold until slave gear moves its full travel. Repeat this three or more times.
bullet Connect drag link to the master gear. Torque attaching nut according to vehicle service manual.
Note: Do not back off nut while finding cotter pin hole.
Note: Always use new cotter pins, retainers or fasteners.
bullet Install new cotter pin through ball stud nut and lock in place.
Note: Not installing a new cotter pin in ball stud could result in loss of steering control.
bullet With the master gear drag link connected, turn the steering wheel too full left turn and hold until slave gear pitman arm reaches full travel. Then turn the steering wheel to full right turn and hold until slave gear pitman reaches full travel. Repeat this three or more times.
bullet Connect the drag link to the slave gear, turn steering wheel until pitman arm lines up with drag link. (Do not move the pitman arm by hand as air may get into system.) Torque attaching nut according to vehicle service manual.
bullet Install new cotter pin through ball stud nut and lock in place.
bullet Turn full left and full right several more times.
bullet Inspect fluid level.
bullet Regularly check power steering reservoir fluid and fluid level.
bullet Drain reservoir and replace filter one to two times a year.
bullet Always clean debris from around reservoir filler cap before removing. Follow same procedure for all fittings and hoses. This will prevent debris from entering system.
bullet Routinely inspect and correct any external leaks. Failure to do so can result in system failure.
bullet Periodically grease all grease fittings on gear and other steering components such as tie rod ends, drag link ends, column u-joint and slip joint.
bullet Investigate and correct any play or shimmy in any component of steering linkage or mechanism.
bullet Do Not weld any damaged steering component.
bullet Do not cold straighten, hot straighten or bend any steering component.
bullet Always replace seals and hard parts that meet or exceed OEM specs.
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Additional Technical Docs

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