Alamo MACHETE Product Service Manual page 161

POSSIBLE FAILURE / CAUSE & SOLUTION
Deck Worn on Underside:
CAUSE:
Deck being Worn and Ripped away by Heavy Debris?
SOLUTION:
Make sure material being cut is not to heavy, large or thick for unit being used, This
type wear will be accompanied by dents and large scratches. The best solution for
this is to make sure that Unit is suited for job. Make sure job is not over tasking Unit.
CAUSE:
Deck Worn from Continuous Use?
SOLUTION:
The Deck will wear over time, If Deck had severe wear by sand or other debris at one
time causing excess (premature) wear, then this will make it wear that much faster
and the only solution would be to replace Deck.
Hydraulic System Noise:
CAUSE:
Restrictions in System? A Squeal may be normal in some Valves when the
lowering function is actuated as Oil is going over restrictors.
SOLUTION:
Check Hoses and Lines for Kinks / Obstructions. Hoses have an inner lining that
can turn loose and block a hose. If Assembly or Repair work has been performed,
recheck all connections for correct location. Some may not be visible without
some disassembly. Unplanned restrictions cause increased backpressure,
loss of usable power and excess heating of Oil. Restrictions can sometimes be
found by measuring the temperature of the Oil (or fittings) at various points in
circuit as heat will usually be higher at the restriction. The restriction should be
located at or upstream of the increased temperature point. Foreign objects that
get into the system sometimes cause restrictions, This can happen during
servicing, maintenance or repairs. It is not uncommon to find bolts, nuts, plastic
plugs, paper or rags stuck into system when it was being repaired or assembled
then forgotten about. Restrictions sometimes can be a piece off of a failed
component up stream or a Component such as a Hose built wrong
CAUSE:
Relief Valve Malfunction?
SOLUTION:
Perform Flow Pressure Test. If Flow is correct and Pressure is Low, remove
Relief Valve and inspect for damaged Seals, Contamination or other abnormali-
ties. Re-Seal, Adjust or replace the Valve as needed. Leakage through the Valve
(from Low Pressure setting) or leakage around the Valve from damaged Seals
will cause heating of the Oil and Low Power complaints. NOTE: There may be
situations when Pump Flow is insufficient to reach Relief Pressure. Therefore it
is important to test for proper Flow before condemning the Relief Valve.
Machete (Service Manual) 04/04
© 2004 Alamo Group Inc.
(Continued)
(Squeal)
161