Vermeer McLaughlin V25, Operator And Maintenance Manual

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90-2 Maintenance - 250 Service Hours V25/VX30G/VSK25/VSK30G Vacuum Excavators
B
RAKES
, E
LECTRIC
- T
EST
Electrical current from the tow vehicle controls the brakes. To function properly, the brakes must be correctly
adjusted, and the electrical components must be reliable.
Step 1: Engage brakes while coasting at 20–30 mph (30–50 km/h) in a traffic-free area. The trailer braking
force should easily be noticed in the tow vehicle.
Step 2: If not operating properly, adjust brakes (see following section) and check the following electrical components:
• Check all wire connections.
• Check trailer plug for corrosion.
• Check magnets for wear or shorting (perform while adjusting brakes).
• Check automatic brake controller.
B
RAKES
, E
LECTRIC
- A
DJUST
Step 1: Jack one wheel up off the ground. Block machine to prevent it from falling.
Step 2: Remove dirt plug (A) in backing plate.
Step 3: While spinning the wheel, turn adjuster screw (B) clockwise until the
wheel has a heavy drag. Then turn adjuster screw counterclockwise only
until wheel turns freely.
Rotate wheel only in the direction of forward rotation when adjusting
brakes.
The adjuster screw may be turned with a screwdriver or with a standard
brake adjusting tool.
Step 4: Install dirt plug.
Step 5: Remove blocking and jack.
Step 6: Repeat above steps for the other brakes.
A
B
TO TIGHTEN
TO LOOSEN