JLG 10MSP Service Manual - Manual (Page 53)

SECTION 3 - BASE COMPONENTS
3121228 – JLG Lift – 3-21
Hydraulic Pressure Gauge Connection
ONLY OPEN HYDRAULIC SYSTEM LINES WITH THE MAST FULLY
LOWERED TO RELIEVE PRESSURE IN THE SYSTEM. CAREFULLY
LOOSEN REQUIRED FITTINGS, WEAR SAFETY PROTECTION
EQUIPMENT WHEN WORKING WITH HYDRAULIC SYSTEMS.
NOTE: See Section 5.6, Hydraulic Line - Disconnect - Spe-
cial Tool, for hydraulic line removal procedure.
Remove the hydraulic oil filter and install a t-fitting
between the pump and the extend line to connect a
hydraulic pressure gauge as shown in Figure 3-4., Typical
Hydraulic Pressure Gauge Installation (Hydraulic Filter
Removed).
CHECK, and if necessary, ADJUST the hydraulic pressure
to initial settings shown in table at the beginning of this
section. Cycle the hydraulic system several times with the
maximum load capacity in the platform, then recheck
pressure setting. When pressure has stabilized continue
to "After Filter Pressure Check" following.
After Filter Pressure Check
Reinstall the hydraulic oil filter and install a t-fitting
between the hydraulic filter and the extend line to the cyl-
inder. Recheck the hydraulic pressure and compare with
the previous readings when filter was removed. If a signifi-
cant drop in pressure reading has occurred, replace the
hydraulic filter and recheck the "after filter" pressure read-
ing.
Figure 3-4. Typical Hydraulic Pressure Gauge
Installation (Hydraulic Filter Removed).
1. Pressure Gauge Assembly
2. Cylinder Extend Line 3. T- Fitting
4. Cylinder Return Line
Figure 3-5. Typical Hydraulic Pressure Gauge
Installation (After Hydraulic Filter).
1. Hydraulic Oil Filter
2. T- Fitting 3. Pressure Gauge Assembly
4. Cylinder Extend Line