HYDRAULIC SYSTEM 14000 SERVICE MANUAL
2-6
Published 09-10-14, Control # 065-24
Changing Oil
See Figure 2-1 for the following procedure.
Drain and refill the hydraulic system every 1,000 hours or
semiannually, whichever comes first, unless an alternate
interval has been established through an oil analysis
program.
1. Operate the crane until hydraulic oil is at normal
operating temperature. This will help prevent impurities
from settling in system.
2. Stop the engine.
3. Attach a rubber hose to pipe on drain valve (7) and insert
end of hose into a suitable container to catch hydraulic
oil. See Folio 2129 for hydraulic system capacity.
4. Open drain valve (7) and drain tank completely.
5. Clean all dirt from stand pipe cap (2a) and remove cap.
Take care to prevent dust and wind-blown dirt from
entering tank while stand pipe cap is off.
6. Flush out any sediment inside tank.
7. Carefully inspect suction filter (inside tank) for damaged
or clogged holes and for sludge, gum or lacquer
formation. If necessary, clean as follows:
a. Remove cover from bottom of tank.
b. Using a wrench, remove suction filter from inside
tank.
c. Soak in clean, nonflammable solvent. Brush off
outer surface, and flush from inside out. Discard if
damaged.
d. Securely reinstall suction filter.
8. Use new seals and securely fasten access covers to
tank.
9. Replace desiccant breather when indicated (see
instructions earlier in this section).
10. Replace return filter element (1) as instructed earlier in
this section.
11. Fully close drain valve (7) and remove rubber hose.
12. Remove return line cap (8) from return manifold.
13. Fill hydraulic tank to FULL COLD LEVEL – 90 to 94% –
while watching hydraulic tank display on information
screen. Use proper hydraulic oil (see Folio 2129).
Do not fill tank to 100%. Oil will flow out of breather.
14. Check tank level and refill as required.
15. Start the engine and allow hydraulic system to return to
normal operating pressure and temperature. Check for
leaks and tighten parts as required.
16. Stop the engine, check tank level, and refill as required.
NOTE: If the hydraulic system was extremely dirty (gum or
lacquer formation on parts indicated by erratic,
jerky, or sluggish operation) repeat Changing Oil
procedure after 48 hours of operation.
Servicing Pumps
It is not necessary to drain the hydraulic tank when servicing
the hydraulic pumps. To service the pumps, close shut-off
valve (6a, Figure 2-1
) in the pump suction manifold.
Open the valve before starting engine after servicing the
pumps.
CAUTION
Avoid Damage to Pumps!
Open hydraulic tank shut-off valve before starting the
engine. Failing to perform this step will result in damage to
pumps from cavitation.
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