An exploded view diagram is an essential tool for anyone working on the suspension of a 1991 Ford Explorer. It breaks down complex assemblies into individual parts, showing how they fit together and in what order. For the 1991 Explorer, which features a Twin-Traction Beam front suspension and a leaf-spring rear suspension, having a clear exploded view makes repairs more predictable and reduces the chance of missing hardware or assembling components incorrectly. This guide explains the common parts shown in such diagrams and how to use them effectively for maintenance or restoration.
Understanding the 1991 Ford Explorer Suspension System
The 1991 Explorer uses a front independent suspension with a twin-traction beam design and a solid rear axle on leaf springs. The exploded view captures every nut, bolt, bushing, and bracket.
Front Suspension Components
- Upper and lower control arms: The upper arm attaches to the frame and the lower arm to the steering knuckle; both pivot on bushings.
- Traction beams: Two beams that locate the front axle and allow wheel movement.
- Coil springs and shock absorbers: Coils are seated on the lower arm; shocks mount between the frame and lower arm.
- Stabilizer bar: Also called sway bar, connected to lower control arms with links and bushings.
- Steering knuckle and spindle: The knuckle carries the wheel hub and attaches to ball joints.
- Ball joints: Upper and lower ball joints connect control arms to the knuckle.
- Tie rod ends: Inner and outer tie rods link the steering rack to the knuckle.
- Radius arms and brackets: Radius arms extend from the axle to the frame, controlling fore-aft movement.
Rear Suspension Components
- Leaf springs: Multi-leaf springs support the rear axle.
- Shock absorbers: Vertical shocks between axle and frame.
- U-bolts and plates: Secure the axle to the leaf springs.
- Spring shackles and brackets: Front and rear shackles allow spring movement.
- Stabilizer bar (if equipped): Some models include a rear sway bar with links and bushings.
- Axle housing: Contains differential and axle shafts.
What an Exploded View Diagram Shows
An exploded view is more than just a picture; it’s a systematic layout.
Fasteners and Hardware
Diagrams typically label every bolt, nut, washer, and cotter pin with a reference number. This helps you know exactly which fastener goes where—critical because torque specs and sizes vary.
Part Numbers and Order
The diagram often includes Ford part numbers for each component. The explosion shows the assembly order: for example, the coil spring sits on the lower control arm before the shock mounts. Following the diagram prevents installing parts in the wrong sequence.
How to Use an Exploded View for Repairs
Identifying Parts
If you’re disassembling a suspension area, match each removed part to the diagram. Lay parts on a clean surface in the same order as the explosion. This makes reassembly straightforward. For instance, when replacing front control arm bushings, the diagram shows whether bushings are pressed in or bolted.
Ordering Replacements
Use the part numbers from the diagram to order correct replacements. For the 1991 Explorer, many suspension parts are still available through aftermarket suppliers or Ford dealerships. Cross-reference numbers from the diagram to avoid buying the wrong bushing or ball joint.
Common Suspension Issues on the 1991 Explorer
Over time, these parts wear:
- Ball joints: Cause clunking and loose steering.
- Bushings: Deteriorate, leading to alignment issues.
- Leaf springs: Sag or break, reducing load capacity.
- Shock absorbers: Leak and lose damping.
- Tie rod ends: Cause wandering and uneven tire wear.
An exploded view helps pinpoint the exact failure point. For example, if the front end clunks, check the upper ball joint or stabilizer link; the diagram shows where each is located.
Practical Tips for Suspension Work
- Label everything: Use a marker on masking tape to tag parts according to the diagram’s reference numbers.
- Torque specs: Follow factory torques for bolts (e.g., lower control arm pivot bolts are typically 100-120 ft-lbs).
- Use penetrating oil: Soak rusted fasteners a day before work.
- Suspension stands: Never rely on a jack alone; use jack stands.
- Alignment: After any front suspension work, get a professional wheel alignment.
Recommendation
For accurate and detailed exploded views, obtain a factory service manual (FSM) for the 1991 Ford Explorer. These manuals contain multiple exploded diagrams covering every suspension subsystem. They also include torque specifications, troubleshooting steps, and part numbers. Online forums and auto parts websites sometimes offer scanned diagrams, but the FSM remains the most reliable resource. When ordering parts, consult the diagram’s part numbers and compare with aftermarket brands like MOOG or TRW for quality replacements. Always double-check the diagram against your vehicle’s actual configuration—some models have minor variations.
Using an exploded view correctly saves time, prevents costly mistakes, and ensures your 1991 Explorer’s suspension is safe and reliable.