2015-18 CHEVROLET CITY EXPRESS CARGO VAN BODY BUILDER MANUAL Pa g e |
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Recommended P
rocedure
Setup
The following vehicle conditions should be verified prior to the measurement:
•
Vehicle Mass: Unloaded Vehicle Condition
—
Full fluids, spare tire, jack and tire tool.
•
Vehicle Posture: Unloaded Vehicle Condition
—
Adjust fender opening height to the design value.
•
Tire: Production parts shall be used. Tire pressure should be set to the specified pressure
on the Tire Placard (located near the front LH door striker) once the vehicle has cooled.
•
Steering Wheel: Set to center of stroke with wheels pointing forward.
•
Seats: Adjust to reference position:
•
Longitudinal slide: Center of slide
•
Seat Lifter: Lowermost
•
Back angle: Set to normal driving condition or as close to 21° as possible.
•
Window Glass: Fully closed.
•
Other Parts: Production parts shall be used.
•
Road Surface to be used: Flat load cell.
•
Measurement Needed: Wheelbase, height of wheel centers from ground, lift heights, axle loads.
•
Shift Position: Neutral for both AT and MT vehicles. For safety, apply the parking brake.
Measurement Methods
1.
The vehicle should be at its unloaded vehicle condition, with full fluids and equipped with spare tire,
jack and tools.
2.
Measure the wheelbase of the vehicle (WB) on the left-hand and right-hand sides of the vehicle
and use the average value for the calculations. Measure the height of the 4 wheel centers from the
ground to get h f and h r.
3.
Replace the shock absorbers with turnbuckles or solid link to avoid suspension travel.
4.
Increase the tire air pressure to the maximum recommended level specified in tire placard or
Owner’s
Manual.
5.
Once the vehicle is on the scale, set the parking brake to prevent vehicle from rolling.
6.
Measure the rear wheel load (W RO) in horizontal position.
7.
Raise the front of the vehicle with a hoist. Lift height should be at 0.5 m (1.6 ft) to start, with
additional lift heights used to improve accuracy. (i.e., 0.5 m (1.6 ft) + a, 0.5 m (1.6 ft) + B).
8.
Measure the rear wheel load (W R) with raised vehicle.
9.
Change the lift height and measure the load on the rear wheel to find the relationship between lift
and load. Measure two times for each lift height.
Follow the same procedure from (7) to (9) by raising the rear wheels.
