Autoquip BASCULE BRIDGE - DOUBLE LEAF - Manual (Page 41)

TROUBLESHOOTING ANALYSIS
DANGER !
To avoid personal injury, NEVER go under the bridge or perform any maintenance
until the load is removed and the bridge is securely blocked. See "Blocking
Instructions" section.
PROBLEM POSSIBLE CAUSE AND SOLUTION
Bridge does not raise. • The motor voltage/wiring may be incorrect.
• The hydraulic line or hose may be leaking.
• Oil in the reservoir may be low. Add oil as
necessary (See the “Routine Maintenance”
section.)
• The load may exceed the bridge rating. (See
the “Specifications” section.)
• The suction screen may be clogged. Remove
and clean the screen. Drain and replace the oil.
• The suction line may be leaking air due to a
loose fitting. Tighten as needed.
• The breather holes in the reservoir fill plug may
be clogged. Remove and clean.
• The "Down" valve may be energized by faulty
wiring or stuck open. Remove the solenoid and
check.
• The power unit pump may be defective
• The structural members of the bridge may be in
a bind.
• The manual lowering device may be engaged.
Bridge seems bouncy during
operation. • There may be air in the hydraulic system.
Bleed the air from the cylinder
• Oil in the reservoir may be low. Add oil as
necessary (See the “Routine Maintenance”
section.)
• The power unit suction strainer may be clogged.
• The power unit suction line may be leaking.
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