JLG 340AJ Service Manual - Manual (Page 214)

SECTION 5 - HYDRAULICS
5-56 – JLG Lift – 3121259
Port Locations and Gauge Installation
PORT LOCATIONS AND GAUGE INSTALLATION
The following table and drawing show the port locations and
gauge sizes needed. When testing system pressures, calibrate
pressure gauges frequently to ensure accuracy. Use snubbers
to protect gauges.
Table 5-7. Port information
Port identifier Port size Wrench size Pressure obtained Gauge size, bar [psi]
L1,L2 1 1/16-12 UNF28 9/16 internal hex Case drain 10bar[100psi]
MA, MB 9/16-18 UNF 1/4 internal hex System pressure 600 bar [10,000 psi]
M3 9/16-18 UNF 2B 1/4 internal hex Charge pressure 50 bar [1000 psi]
M4,M5 7/16-20 UNF 2B 3/16 internal hex Servo pressure 50 bar [1000 psi]
Figure 5-31. Port Locations