Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Suspension Strut / Shock Absorber: Initial Inspection and Diagnostic Overview
CAUTION: The low-pressure gas shock absorbers are charged with nitrogen gas to 931 kPa (135 psi) for 1 inch and 1-3/16 inch bore, and 1034 kPa
(150 psi) for 1-3/8 inch bore. Do not attempt to open puncture or apply heat to the shock absorbers.
NOTE: All vehicles are equipped with low-pressure gas-filled hydraulic shock absorbers of the direct acting type. They are nonadjustable and
nonrefillable. They cannot be serviced as cartridges and must be serviced as shock assemblies.
Before replacing a shock absorber, check the action of the shock absorbers as follows:
1. Check all tires for proper inflation pressure.
2. Check tire condition to confirm proper front end alignment, tire balance and overall tire condition such as separation or bulges.
3. Check the vehicle for optional suspension equipment such as heavy duty handling or trailer tow suspensions. These suspensions will have a firmer
ride feeling than standard suspensions.
4. Check the vehicle attitude for evidence of possible overload or sagging.
Many times front spring or torsion bar and front shock absorbers are replaced in an effort to solve a vehicle sag concern. Shock absorbers by
design are hydraulic damping units only, and unlike suspension springs, do not support any suspension loads. Therefore, replacing a shock
absorber will not correct a vehicle sag concern.
5. Road test vehicle to confirm customer concern.
6. Make sure the shock absorber is securely and properly installed.
7. Check the shock absorber insulators for damage and wear.
8. Replace any worn or damaged insulators and tighten attachments to the specified torque (on a shock absorber which incorporates internal
insulators, replace the shock absorbers).
9. Tighten shock absorber attachments to specified torque.
10. Inspect the shock absorber for evidence of fluid leakage.
A light film of oil (weepage) on the upper portion of the shock absorber is permissible and is a result of proper shock lubrication. Weepage is a
condition in which a thin film of oil may be deposited on the shock outer tube (body) and is normally noticed due to the collection of dust in this
area. Shock absorbers which exhibit this weepage condition are functional units and should not be replaced. Leakage is a condition in which the
entire shock body is covered with oil and the oil will drip from the shock onto the pavement.
If this condition exists, perform the following steps:
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Make sure that fluid observed is not from sources other than the front shock absorber.
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Replace the worn or damaged front shock absorber.
11. Disconnect the lower end of the front shock absorber.
12. With shock absorber in normal upright position, extend and compress the shock absorber as fast as possible, using as much travel as possible.
Action should become smooth and uniform throughout each stroke.
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Higher resistance on extension than on compression is a normal condition.
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Faint swish noises are also normal.
