Lull 944E-42 Service Manual - Manual (Page 172)

Axles, Drive Shafts, Wheels, Tires and Brakes
5.26 Model 644E-42/944E-42 Rev. 6/04
5.6 BRAKES
5.6.1 Brake Disc Inspection
Check the brake discs for wear every
1,000 hours of operation or yearly.
If the brake discs require service due to
wear, the axle should be checked,
serviced and repaired only by
experienced service technicians who are aware of all
safety instructions and particular component features.
a. Front Axle
1. Block all four wheels to help prevent the vehicle
from moving after the parking brake is disabled.
2. Remove the four capscrews (1) securing the valve
plate cover (2) to the cab floor. Remove the cover.
3. Attach a remote portable hydraulic pressurizing unit
to the parking brake gauge port (3) on the secondary
function manifold (4) mounted on the valve plate.
Note: DO NOT Turn the key switch to the ON. DO NOT
release the parking brake switch. Oil pressure will be lost
and Parking Brake will be engaged.
4. Pressurize the parking brake with the pressurizing
unit. Close the needle valve on the pressurizing unit.
5. Working through the level plug hole (5), carefully use
a screwdriver to spread the brake discs apart.
IMPORTANT: DO NOT damage the surfaces of the
brake discs when spreading the brake discs.
6. Using a feeler gauge, check the gap (6) between the
brake discs (7). If the gap is greater than:
644E ....................................0.181" (4,6 mm)
944E ....................................0.185” (4,7 mm)
Replace the brake discs if the gap is greater than
listed above.
WARNING:
BLOCK ALL FOUR
WHEELS. Failure to do so could result in death
or serious injury from vehicle roll-away
OH2690
1000
OU0740
1
2
3 4
CAUTION:
DO NOT exceed 650 psi (45
bar) when pressurizing the park brake. Apply-
ing too much pressure may damage the brake
seals.
5
MT2850
MU5590
6
7