SAF-HOLLAND XL-FW503 FleetMaster LowLube Series Fifth Wheels with Manual Sliding Secondary Lock XA-201-S10217, XA-201-S10579 & XA-231-S10217 - Manual (Page 6)

6 XL-FW503 Rev B
INSTALLATION INSTRUCTIONS
continued
Sliding Fifth Wheel Installation
continued
1.00˝
(25.4 mm) MIN.
CENTER LINE OF
TRACTOR REAR
AXLE(S) OR
BOGIE
PLATE LENGTH PLUS 2.00˝ MIN. (50.8 mm)
4.00˝
(101.6 mm)
max.
1˝ min. 6 bolts equally spaced
FORWARD TRAVEL
FIGURE 4 (Side View)
TRUCK FRAME RAIL
The full length of the fifth wheel mounting angle should seat flush on
the truck frame when mounting to prevent flexing of mounting angle
and to give uniform weight distribution along truck frame rail.
FIGURE 5
5/8˝ diameter Grade 8 bolts minimum size,
tightening torque to bolt manufacturer charts.
Hardened steel washers or flanged locknuts.
5/8˝ diameter Grade “C” locknuts. HARDENED STEEL
WASHERS
FIGURE 6
Inboard Angle Mounting continued
3. Position the angles on the slide
plate for the required frame width.
Be sure to keep the plate centered
left to right, and front to rear on
the mounting angles.
4. Weld as shown in FIGURE 3. Make
5/16˝fillet welds inside and 3/8˝
groove welds on the outside with skip
welds 3˝ long on approximately
8 -1/2˝ centers (weld 3˝, skip
5-1/2˝). Weld inside opposite skips
on the outside. ALSO WELD: The
plate to the top of the angle at the
ends of the plate.
5. Attach the slider plate and
mounting angles to the tractor
using recommendations in
“General Recommendations”
and in FIGURE 4.
6. Reassemble the fifth wheel top
plate and bracket sub-assembly to
the slider base plate if they were
removed previously.
Outboard Angle Mounting
(See Figures 5 and 6):
1. If angles are not installed, see “Installation: General Recommendations,” on page 3,
for thickness and material. Use 3˝ minimum horizontal and 3 -1/2˝ minimum
vertical leg size. Longer horizontal legs may be required with narrow frame widths.
The recommended length of each mounting plate is the same length as the slide
base mounting plate.
2. In addition to the information given in “Installation: General Recommendations,”
on page 3, follow the recommendations in FIGURE 5 and FIGURE 6. The following
sequence is suggested:
A. Securely position the mounting angles to the tractor frame and attach as shown
in FIGURE 5. Follow the bolting recommendations as shown in FIGURE 4. Angles
must be flush with the top of the truck frame.
B. Locate the slide base and center left to right and front to rear on the mounting
angles. Clamp in place and drill 21/32˝ diameter holes using the mounting
plate as a template if holes are not provided in the angle.
C. Align holes in the slide plate with outboard angle mounting holes and bolt
using Grade 8 fasteners, hardened steel washers and Grade C locknuts, properly
tightened, (see FIGURE 6). Use all mounting holes on the fifth wheel.