JLG 460SJ Service Manual - Manual (Page 190)

SECTION 3 - CHASSIS & TURNTABLE
3-138 – JLG Lift – 3120895
3.29 PERKINS ENGINE GENERAL
MAINTENANCE
Replacing the Engine Crankcase Breather
KEEP ALL PARTS CLEAN FROM CONTAMINANTS. CONTAMI-
NANTS MAY CAUSE RAPID WEAR AND SHORTENED COMPONENT
LIFE.
1. Loosen the screws (1) and remove the breather
cover (2) from the valve mechanism cover.
2. Remove the spring (3). Remove the diaphragm and
plate (4).
3. Clean the vent hole (6) and the cavity (5) in the valve
mechanism cover.
MAKE SURE THAT THE COMPONENTS OF THE BREATHER
ASSEMBLY ARE INSTALLED CORRECTLY. ENGINE DAMAGE MAY
OCCUR IF THE BREATHER ASSEMBLY IS NOT WORKING COR-
RECTLY.
4. Install a new diaphragm and plate (4) for the
breather assembly into the cavity (5) of the valve
mechanism cover.
5. Install a new spring (3).
6. Install the breather cover (2) and the four screws (1).
Tighten the screws.
Engine Oil Level - Check
HOT OIL AND HOT COMPONENTS CAN CAUSE PERSONAL
INJURY. DO NOT ALLOW HOT OIL OR HOT COMPONENTS TO
CONTACT THE SKIN.
NOTE: Perform this maintenance with the engine stopped.
1. Maintain the oil level between "ADD" mark (Y) and
"FULL" mark (X) on oil level gauge (1). Do not fill the
crankcase above "FULL" mark (X).
NOTE: Operating your engine when the oil level is above the
"FULL" mark could cause your crankshaft to dip into
the oil. The air bubbles created from the crankshaft
dipping into the oil reduces the oil's lubricating char-
acteristics and could result in the loss of power.
2. Remove the oil filler cap and add oil, if necessary.
Clean the oil filler cap. Install the oil filler cap.
Engine Oil and Filter - Change
HOT OIL AND HOT COMPONENTS CAN CAUSE PERSONAL
INJURY. DO NOT ALLOW HOT OIL OR HOT COMPONENTS TO
CONTACT THE SKIN.
CARE MUST BE TAKEN TO ENSURE THAT FLUIDS ARE CON-
TAINED DURING PERFORMANCE OF INSPECTION, MAINTE-
NANCE, TESTING, ADJUSTING AND REPAIR OF THE PRODUCT.
BE PREPARED TO COLLECT THE FLUID WITH SUITABLE CON-
TAINERS BEFORE OPENING ANY COMPARTMENT OR DISASSEM-
BLING ANY COMPONENT CONTAINING FLUIDS.
DISPOSE OF ALL FLUIDS ACCORDING TO LOCAL REGULATIONS
AND MANDATES.
NOTE: Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
1. Screws for the breather cover
2. Breather cover
3. Spring
4. Diaphragm and plate
5. Cavity
6. Vent hole
Figure 3-83. Crankcase Breather - Perkins