Drive Pumps; Port Locations And Gauge Installation - JLG 1850SJ Service And Maintenance Manual

5.7 DRIVE PUMPS

Electric displacement control
Servo piston
Swashplate feedback pin
Piston
Slipper
Rear shaft bearin g
Rear shaft
Swashplate bearing
Swashplate

Port Locations and Gauge Installation

Port identifier
L1, L2, L3
MA, MB, MC, MD
M3
M4, M5
X7
3121619
SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS
Valve plates
Shaft coupling
Center shaf t bearings
Cylinder block
Figure 5-128. Piston Pump Cross Sectional View
Table 5-33. Port information
Port size Wrench size
1 1/16-12 UNF 2B 9/16 internal hex
9/16-18 UNF 1/4 internal hex
9/16-18 UNF 2B 1/4 internal hex
7/16-20 UNF 2B 3/16 internal hex
9/16-18 UNF 2B 1/4 internal hex
Electric displacement control
Servo piston
Swashplate
Cylinder block
Reading Gauge size, bar [psi]
Case drain 10 bar [100 psi]
System pressure 600 bar [10,000 psi]
Charge pressure 50 bar [1000 psi]
Servo pressure 50 bar [1000 psi]
Brake pressure 50 bar [1000 psi]
Swashplate feedback pin
Piston
Slipper
Front shaft bearing
Shaft seal
Front shaf t
Swashplate bearing
5-129