Parking Brake/Transmission De-Clutch Test Procedures - JLG sky trak mmv Service Manual

2.15 PARKING BRAKE/TRANSMISSION
DE-CLUTCH TEST PROCEDURES
To check that the parking brake/transmission de-clutch
system is functioning properly, perform the following
tests.
IMPORTANT: These tests should be performed in
[1] FIRST gear only.
WARNING:
vehicle unless you are in the seat with the seat
belt fastened around you. Death or serious
personal injury could result if the belt is not
securely fastened.
Test 1 - Transmission De-Clutch
Step 1
a. Place the vehicle on a level surface.
b. Clear the area in front and behind the vehicle of
any obstacles.
c. Fasten your seat belt.
d. Push and turn the ignition switch and start the
engine.
e. With the parking brake applied, move the range
select lever to [1] FIRST gear.
f. Move the travel select lever to [F] FORWARD.
g. Depress the throttle pedal fully. The unit should
not move.
Step 2
a. Remove your foot from the throttle pedal.
b. Move the travel select lever to [R] REVERSE.
c. Depress the throttle pedal fully. The unit should
not move.
d. Remove your foot from the throttle pedal.
e. Move the travel select lever to (N) NEUTRAL.
Test 2 - Transmission De-Clutch/Parking
Brake Activation
a. With the vehicle unloaded, disengage the park-
ing brake.
b. Move the travel select lever to [F] FORWARD.
c. Move the unit slowly in a forward direction
(approximately 1 mph [1,6 kmh]).
d. Engage the parking brake. The unit should stop
abruptly.
Test 3 - Park Brake Hold Performance
a. With the rated load of 11,000 lbs (4.989 Kg) on
the forks, drive the vehicle forward up a 15%
grade (15 ft. rise over 100 ft. run).
Model MMV Rev. 12/04
General Information, Specifications and Maintenance
DO NOT operate this
b. Stop the vehicle using the service brakes, apply
the park brake, shift the transmission into NEU-
TRAL (N).
c. Take your foot off the service brake pedal. The
vehicle should not move.
d. Apply the service brakes, shift the transmission
into REVERSE [R], move the park brake switch
to the OFF position and back down off the grade.
e. Repeat "Test 3" by backing up the grade and
checking the park brake holding performance.
If the parking brake or transmission de-clutch does not
pass these tests, do the following.
1. Immediately remove the vehicle from service.
WARNING:
WHEELS. Failure to do so could result in death
or serious personal injury from vehicle roll
away.
2. Block all four wheels to prevent the vehicle from
moving.
3. Place the accident prevention tags (8) on the ignition
switch and the steering wheel.
4. Service the parking brake immediately or contact
your local JLG Authorized Service Center (ASC) to
repair the system.
BLOCK ALL FOUR
DANGER
8
OM1510
2.81