JLG 1500SJ Service Manual - Manual (Page 624)

SECTION 7 - BASIC ELECTRICAL INFORMATION & SCHEMATICS
7-44 – JLG Lift – 3121262
V2 V1
JIB TELESCOPE CYLINDER
BORE 2.5" 4.91 sq in
ROD 1.5" 1.78 sq in
ANNULAR 3.14 sq in
STROKE 118"
RATIO 1.56:1
V2
V1
JIB LEVEL CYLINDER
BORE 5.5" 23.76 sq in
ROD 2.5" 4.91 sq in
ANNULAR 18.85 sq in
STROKE 16.59"
RATIO 1.26:1
JIB LIFT CYLINDER
BORE 5" 19.63 sq in
ROD 2.5" 4.91 sq in
ANNULAR 14.73 sq in
STROKE 25.15"
RATIO 1.33:1
JIB CONTROL VALVE
T
C2 C1
V1 V2
V1
V2
TO GR
PORT ON
MAIN
CONTROL
VALVE
TO PORT ON
HIGH PRESSURE
FILTER
- 0
+50
P1
- 50
+ 0
LA
MLA
LB
MLB
TA TB SA SB
- 0
+50
JA JB
- 0
+50
- 50
+ 0
MTA
MTB
MJA
MJB
MP
T1
T2
- 0
+50
T3
P2
2800
PSI 1200
PSI
2.0
GPM 0.3
GPM
3000
PSI
3000
PSI
1500
PSI
2600
PSI
JIB STOW ROTATOR
66 CU IN
10:1 PILOT RATIO
SPRING 3300 PSI
Figure 7-49. Hydraulic Schematic - Sheet 9 of 10