JLG 680S, Service And Maintenance Manual

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SECTION 5 - BASIC HYDRAULICS INFORMATION & SCHEMATICS
3121234 5-47
5.5 PISTON PUMP (PRIOR TO SN 0300180778)
Table 5-6. Gauge and Port information
Table 5-5. Symbols Used
Symbol Meaning Symbol Meaning
Non-reusable part, use a new
part Inspect for wear or damage
Option - either part may exist Note correct orientation
Internal hex head Torque specification
O-ring boss port Pull out with tool - press fit
Lubricate with hydraulic
fluid Cover splines with installa-
tion sleeve
Apply grease /petroleum
jelly Pressure measurement /
gauge location or specifica-
tion
The symbols above can be found in the pump illustrations. The legend above is provided to
define each symbol and explain its purpose.
Inlet port S
SAE J1926/1, 1.875-12
System gauge po
SAE J1926/1, 0.4375-20
Case drain po rt L1
SAE J1926/1, 0.875-14
Outlet port B
SAE J1926/1, 1.3125-12
Case drain port L2
SAE J1926/1, 0.875-14
rt M2
Figure 5-84. Gauge Port Locations
Port Purpose Range of Pump Fitting
M2 System pressure 0-5000 psi (0-300 bar) 7/16 - 20 o-ring fitting
M4 Servo pressure 0-5000 psi (0-300 bar) 7/16 - 20 o-ring fitting
L1,L2 Case pressure 0-100 psi (0-10 bar) 7/8 - 14 o-ring fitting
X1 Load Sense signal 0-5000 psi (0-300 bar) 7/16 - 20 o-ring fitting (tee into Load Sense signal line)