Gradall 534B (9020-7317) Service Manual - Manual (Page 115)

HOW TO TEST AND ADJUST
THE PARKING BRAKES
Slowly and safely drive unit on a 10 to 15 degree
incline. Make sure the area is clear of traffic, and
workmen. Apply parking brakes. If brakes do not
hold, return to a level surface and turn the hand
knob on the top of the parking brake lever
clockwise. Retest the parking brake on the incline.
If the knob adjustment fails to hold the Materials
Handler, there is another adjustment at the other
end of the parking brake cable.
HOW TO TEST AND ADJUST
THE SERVICE BRAKES
G R A D A L L L O E D M AT E R I A L H A N D L E R 5 3 4 B T E S T I N G A N D A D J U S T I N G
In a clear, safe area, slowly drive the
Gradall Loed Materials Handler on a level
surface and 1st the service brakes.
If this test is OK. try the same test on a 10 to 15
degree ramp. Apply foot pedal and set mico rock.
If the brakes don’t hold on the ramp, or if the unit
stops too quickly, make the following
adjustments, from level ground, with fork on
ground.
1.
2.
3.
Use the bleeder fittings located at each front
wheel to bleed air from the brake lines.
Pull plugs from lower inside of each front axle
hub, and with a screwdriver or brake
adjusting tool, turn the brake rachet until
each side bottoms and then back off 2 clicks.
To tighten the left rachet, turn rachet down;
to tighten the right rachet, turn rachet up.
Make sure the brake fluid reservoir, located
behind the operator’s cab, is full.
4. a.
b.
c.
7