FOR MODELS: JGW, JGR AND JGJ SECTION 6 - TECHNICAL ASSISTANCE
PAGE 6 - 2 1/01
8. Check shutdown set points.
9. Low oil pressure shutdown is 35 psi (240 kPa) minimum.
10. High temperature shutdown to be set within 25°F (14C) of actual operating tem-
perature.
11. High-low pressure shutdowns set as close as practical. Consideration should be
given to rod load capacity of machine.
12. Check lubricator box oil level.
13. Check for unusual noises or vibrations.
14. If balance valves are used in the force feed lube system, readjust as required to
keep pump systems pressure balanced (refer to Figure 4-9: on page 4-20).
Monthly (in addition to Daily Requirements)
1. Check and confirm safety shutdown functions.
2. For cylinders rated greater than 3500 psi (24 000 kPa), remove cylinder heads
and check cylinder for oil presence to verify lubrication is adequate.
Every 6 Months or 4,000 Hours (plus Daily/Monthly)
1. Drain and replace lubricator box oil.
2. Change oil filter or when differential pressure exceeds 10 psi (70 kPa).
3. Change oil. A more frequent oil change interval may be required if operating in
an extremely dirty environment or if the oil supplier recommends it or if an oil
analysis dictates it. A less frequent oil change interval may be allowed if the oil is
replenished on a regular basis due to force feed lubricator usage.
4. Clean the sintered element in the small oil filter supplied on the force feed lubri-
cation system. This filter should also be cleaned every time the main oil filter is
changed.
5. Clean strainer when oil is changed.
6. Open frame when oil is changed and visually inspect for foreign material. Disas-
sembly is not recommended unless a reason for it is identified.
7. Check fluid level in damper (if applicable).
8. Re-tighten hold down stud-nuts to proper torque values and perform a soft foot
check. More than 0.002 inches (0.05 mm) pull down requires re-shimming. If re-
shimming is required, realign if necessary to hold coupling alignment within
0.005 inches (0.13 mm) TIR.
9. For cylinders rated greater than 3500 psi (24 000 kPa), inspect piston ring end
gap. Replace rings that are outside the maximum limits listed in Table 1-7, Table
1-8, Table 1-9 and Table 1-10.
Yearly or 8,000 Hours (plus Daily/Monthly/6 Months)
1. Check main bearing clearance, connecting rod bearing clearance, and crank
thrust clearance with a bar and indicator. If outside the limits listed in Table 1-3
on page 1-9, replace the affected bearings.
2. Check crosshead guide clearance with feelers, and if outside the limits listed in
Table 1-3 on page 1-9, replace the affected parts.
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