Alamo PA92 - Manual (Page 151)

MAINTENANCE
PA92 03/08 Maintenance Section 5-3
© 2008 Alamo Group Inc.
MAINTENANCE
HYDRAULIC SYSTEM
Oil Supply
Check daily the oil level in the reservoir. No fixed time period can be quoted for oil changes as operating
conditions and maintenance standards vary so widely. Burnt and scorched oil odors and the oil darkening and
thickening are all signs of oxidation and indicate the oil should be changed.
Moisture which results from condensation can become entrapped in the oil and cannot be removed by filtration
so that contamination is a progressive factor.
Contamination can be reduced by:
1. Cleaning off around the reservoir cap before removal, and keeping that area clean.
2. Using clean containers when replenishing the system.
3. Regular servicing of the filtration system.
Filtration Maintenance
The machine is protected by a 125 micron suction strainer and a low pressure 10 micron full flow return line
filter.
1. Suction Strainer
The strainer is fixed in position within the reservoir. Should indications of pump cavitation or spongy
intermittent operation occur the tank must be drained and flushed out with a suitable cleaning agent, e.g.
clean diesel oil.
2. Return Line Filter
The element should be changed after the first 50 hours and thereafter at 500 hour intervals. It is important
to note hours worked as if the filter becomes blocked. An internal by-pass within the canister will operate
and no symptoms of filter malfunction will occur to jog your memory.
HYDRAULIC HOSES
The condition of all hoses should be carefully checked during routine service of the machine. Hoses that have
been chafed or damaged on their outer casing should be securely wrapped with waterproof adhesive tape to
stop the metal braid from rusting. Hoses that have been suffered damage to the metal braid should be changed
at the earliest opportunity.