4 — MAINTENANCE
4-3
4-2 WHEEL NUT TORQUE REQUIREMENTS
It is very important to apply and maintain the correct wheel nut torque on the boom lift
trailer. The wheel nuts must be evenly tightened to the following specified torque incre-
ments whenever a trailer wheel is removed and installed. Use the following tightening
procedure:
1. Evenly tighten the wheel lug nuts to 25 lb-ft (34 N
·m) in the tightening sequence
shown in Figure 4-1.
Figure 4-1. Wheel Nut Tightening Sequence
2. Evenly tighten the wheel lug nuts to 60 lb-ft (81.4 N
·m) using the nut tightening
sequence shown.
3. Evenly tighten the wheel lug nuts to 100 lb-ft (135.6 N
·m) using the nut tighten-
ing sequence shown.
4-3 LUBRICATION
Lubrication makes operation of the XLB-4725A Boom Lift more efficient and extends the
equipment life. Use the following procedures to lubricate the boom lift components.
1. Lubricate trailer and outrigger jack posts and all grease fittings labeled
LUBRICATE WEEKLY with NLGI Grade 2 multi-purpose grease.
2. Lubricate all LUBRICATE MONTHLY grease fittings with NLGI Grade 2
multi-purpose grease. Wipe off dirt and grease residue. Add approximately ½
ounce of fresh grease to each fitting. See Figure 4-2 for grease fitting locations.
Figure 4-2. Lubricate Monthly
