Mega MMP4, Maintenance Manual

Page: 28 / 96

6-1
MMP4-CAT(T4)-MX-2
26 Feb 2014
SECTION 6
Axle and Suspension
Contents
DESCRIPTION
The MMP4 is equipped with a 6,000 lb (2,725 kg)
rated single axle utilizing a double eye leaf spring
suspension. The springs are attached to the frame by
welded spring hangers. The axle is attached to the
springs by U-bolts with weld on axle mounts.
Mounted to the axle hubs by 8 lug nuts are load
range E tire and rim assemblies. Each tire and rim
assembly is protected by a steel fender that contains
a front amber marker lamp and rear red marker lamp
assembly. Current production models are not
equipped with brakes.
SERVICE
1. Park MMP4 on firm level ground, lower forward
landing gears, raise hitch, uncouple MMP4 from
tow vehicle.
2. Lower rear landing gear until the MMP4 is stable.
3. With a jack of adequate capacity raise 1 tire in the
air high enough to remove the tire.
4. Place a jack stand under axle to prevent axle from
falling.
Do not lift the axle for the center, place jack under
the U-bolts towards the axle end. Ensure jack
stands of proper capacity is used to secure the
axle prior to removing the tire assembly. Failure
to properly lift and secure the MMP4 properly
may result in an unstable load, over loading of
the jack or damaging an MMP4 component
causing damage to the MMP4.
5. Lower the landing gear to re-stabilize the MMP4.
MMP4 must be stable and secure on adequate
capacity jack stands and the jack removed prior
to servicing the hub assembly. Failure to secure
and ensure the MMP4 is stable and secure will
result in serious personal injury or death if the
unit falls.
6. Semi-annually (every 6 months), remove rubber
plug at the center of the wheel bearing cap.
7. Pump grease into the grease fitting in the spindle
end with a manual type grease gun only.
Do not mix Lithium, Calcium, Sodium or Barium
complex greases due to possible compatibility
problems. When changing from one type of
grease to another, it is necessary to disassemble
the wheel bearing and ensure all grease is
removed prior to re-packing or servicing the
wheel bearing. Failure to ensure greases are not
mixed may result in wheel bearing, axle end, hub,
MMP4 or tow vehicle damage.
8. Rotate wheel while pumping grease into fitting.
Description .........................................................................6-1
Service..................................................................................6-1
Inspection ...........................................................................6-2 Repair ...................................................................................6-2
Reassembly ........................................................................6-3