Saf-holland XL-FW503 FleetMaster LowLube Series Fifth Wheels w Manuel d'utilisateur télécharger pdf (Page 3)

XL-FW503 Rev B 3

INSTALLATION INSTRUCTIONS

continued

Installation

General Recommendations

1. Every user and installer using SAF-HOLLAND products either recommended or not

recommended by

SAF-HOLLAND, must thoroughly satisfy himself that the installation

procedure used is appropriate for the vehicle, product and application.

2. Consult the

SAF-HOLLAND literature for fifth wheel capacities and applications.

3. Consult the tractor manufacturer’s body builder’s book and the latest SAE and D.O.T.

standards for additional installation methods.

SAF-HOLLAND recommends the T.M.C.

Recommended Maintenance Practice 603B for installation procedures.

Determine the proper fifth wheel position, or, in the case of a sliding fifth wheel, the range of

proper positions. Proper positioning of the fifth wheel is important for weight distribution,

swing clearance and handling characteristics. See SAE J701a for proper placement, as well as

the tractor manufacturer’s body builder’s book.

5. Use Grade 8, 5/8˝ minimum diameter bolts and Grade “C” locknuts for mounting.

6. Bolt holes can be 1/32˝ larger in diameter than the bolt fastener. Bolts must be adequately

tightened using charted torque ranges in foot-pounds for the recommended Grade 8, 5/8˝

diameter bolts. Larger diameter Grade 8 bolts and coated fasteners may be used.

7. The bolts attaching the fifth wheel mounting angles to the truck frame require hardened

steel washers under both the bolt and under the locknut, unless flanged head bolts or

flanged head locknuts are employed.

8. A minimum of 5 bolts are required to attach each mounting angle to a frame rail, and the

distance between bolts must not exceed 8˝, except when cutouts are required in the

mounting angles.

9. Whenever a cutout is made on the mounting angle, such as required to bypass spring

hangers, a 1˝ minimum radius should be used and bolts should be placed within 1-1⁄2˝, but

not closer than 1˝ of the cut, fore and aft.

10. The mounting angle should have a minimum thickness as shown in Chart 1 and should be

steel specification ASTM A 36.

11. When initially positioning the fifth wheel for frame holes, the full length of the fifth wheel or

slider mounting angles should seat flush on the top and side sur

face of the truck-tractor

frame rails where channel-type rails

are employed. There should not be a

gap over the top of the truck frame

rails. The base of the fifth wheel

assembly and of the mounting angle

members should seat flush on the top

of the frame rail to prevent flexing

and to give uniform weight

distribution. It is also recommended

to chamfer or smooth sharp edges

and corners of mounting materials

wherever contact is made with the

tractor frame.

12. If the fifth wheel is to be mounted using a mounting plate (bracket with mounting base),

refer to CHART 1 for minimum plate thickness recommendations.

Do not use U-bolts in fifth wheel installations. Use only new Grade 8 bolts and

new Grade C lock nuts, sized 5/8˝ minimum diameter. Failure to do so may

result in structural failure of the installation with a potential loss of the fifth wheel assembly,

mounting structure, and/or trailer and may result in death or serious injur

13. Trailer pick-up ramps are recommended at the rear of the truck-tractor frame.

14.

When mounting to aluminum frames, follow the tractor manufacturer’s recommendations.

SAF-HOLLAND has available a stationary mounting angle intended for use with aluminum

frames. Contact

SAF-HOLLAND or distributors of Holland brand products for availability.

15. Review, in addition, the specific information on the following pages for each type of fifth

wheel mounting, as well as “Inspection and Lubrication Prior to Use” on page 8 of this

publication.

CHART 1

Minimum Minimum

Fifth Wheel Mounting Angle Mounting Plate

Vertical Capacity Thickness Thickness

12,000 lbs. 1/4˝ 1/4˝

20,000 lbs.

5/16˝ 1/4˝

40,000/45,000 lbs. 5/16˝ 5/16˝

50,000/55,000 lbs. 3/8˝ 3/8˝

62,500/70,000 lbs. 1/2˝ 1/2˝

100,000 lbs. 3/4˝ 3/4˝

165,000 lbs. 3/4˝ 1˝

1 2 3 4 5 6 7 8 ... 23 24

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Saf-holland XL-FW503 FleetMaster LowLube Series Fifth Wheels w Manuel d'utilisateur Page 3

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