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page 16
S-5-UT
2.3
Running Gear
Suspension
The suspension on your trailer is either a rubber torsion axle type or the slipper leaf
spring type. Rubber torsion suspensions require no maintenance.
Slipper springs have an eye formed in one end of the spring only with the other end
formed into a reverse curve. The attachment of these springs is as follows:
1. The front eye is attached directly into the front hanger with a bolt and nut.
2. The rear end of the spring is captured in the rear hanger or equalizer with a
‘keeper bolt’ that prevents the spring from coming out when the trailer is jacked up for
service.
Visually inspect the suspension system every 6,000 miles for signs of excess wear,
elongation of bolt holes, and loosening of fasteners. Whenever loose or replaced the
fasteners in your suspension system should be torqued as detailed below:
1. U-bolt- 45 to 60 lbs.-ft.
2. Shoulder Type shackle bolt- 30 to 50 lbs.-ft.
3. Fasteners with castle nuts- snug fit only. The cotter pin will retain the nut-bolt
assembly.
Hubs and Drums
Hub Removal- Whenever the hub equipment on your trailer must be removed for
inspection or maintenance the following procedure should be utilized:
1. Before jacking up the wheel, break loose the wheel lug nuts. Do not loosen them
more than
1
/
2
turn while the trailer wheel is still on the ground.
2. Jack up the wheel. Use a jack stand to support the axle. If the wheel does not
rotate freely, back off the brake adjustment. Remove the wheel.
3. Remove the grease cap (hubcap) by carefully prying progressively around the
flange of the cap.
Maintenance
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