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GRC-12
Genie GRC-12 Service Manual
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Section 6 • Schematics
September 2016
REV B
6 - 14
GRC
P
ar
t
No.
227123
Hydraulic Schematic
CA
LL-O
UT LEGEND
I
t
em D
esc
r
i
p
tion
A Te
st
p
ort
B
C
heck v
a
l
ve,
st
eer circuit
C Re
l
ie
f
v
alv
e
,
l
if
t
D
C
heck v
a
l
ve, br
ake c
ir
cui
t
E Dr
ive
forw
a
r
d
/
reve
rse
F Ste
er
left
/ri
ght
G
Flow r
egu
l
at
or
/r
e
l
i
ef val
ve
H
Pl
at
f
or
m
up
I Rel
i
e
f
valve,
system
J
H
and p
ump
,
manu
al
bra
k
e r
el
eas
e
K
C
heck va
lve,
ma
n
ual
br
ak
e r
e
lea
se
N P
la
tf
o
rm
lo
w
er
in
g
v
a
l
v
e
O
O
r
i
fi
ce,
pl
at
form
do
wn c
irc
uit
115
117
Table of Contents
Table of Contents
7
Introduction
2
Serial Number Information
2
Serial Number Legend
3
Safety Rules
5
Table of Contents
7
Part
12
Machine Specifications
13
Performance Specifications
14
Hydraulic Specifications
14
Manifold Component Specifications
15
Hydraulic Hose and Fitting Torque Specifications
16
Observe and Obey
19
About this Section
19
Pre-Delivery Preparation Report
20
Maintenance Inspection Report
23
Checklist a Procedures
24
Inspect the Manuals and Decals
24
Perform Pre-Operation Inspection
25
Perform Function Tests
25
Perform 30 Day Service
26
Grease the Steer Yokes
26
Checklist B Procedures
27
Inspect the Batteries
27
Inspect the Electrical Wiring
30
Inspect the Tires and Wheels (Including Castle Nut Torque)
31
Test the Emergency Stop
31
Test the Key Switch
32
Test the Automotive-Style Horn (if Equipped)
32
Inspect the Voltage Inverter (if Equipped)
33
Test the Drive Brakes
34
Test the Drive Speed - Stowed Position
35
Test the Drive Speed - Raised Position
36
Test the Slow Drive Speed
37
Test the Flashing Beacons
38
Test the Motion Alarm (if Equipped)
38
Perform Hydraulic Oil Analysis
40
Inspect the Breather Cap
40
Inspect the Electrical Contactor
41
Checklist C Procedures
42
Replace the Hydraulic Tank Breather Cap - Models with Optional Hydraulic Oil
42
Checklist D Procedures
43
Replace the Hydraulic Tank Return Filter
43
Checklist E Procedure
44
Test or Replace the Hydraulic Oil
44
Or Spray
44
Platform Controls
48
Circuit Board
49
With Electrically Charged Circuits
49
Joystick
50
Platform Controls Alarm
50
Electrocution/Burn Hazard. Contact
50
Platform Emergency Stop Button
51
Ground Controls
52
Software Revision Level
53
Machine Setup
54
Level Sensor
55
Hydraulic Pump
58
Function Pump
58
Function Manifold
60
Function Manifold Components
60
Valve Adjustments - Function Manifold
62
Valve Coils
66
Brake Release Hand Pump Components
68
Hydraulic Tank
69
Steer Axle Components
70
Yoke and Drive Motor
70
Connections very Slowly to Allow
71
Steer Cylinder
72
Steer Bellcrank
72
Gradually. Do Not Allow Oil to Squirt
72
Non-Steer Axle Components
73
Drive Brake
73
Platform Components
74
Platform
74
Platform Extension
74
Mast Components
76
Mast
76
Wear Pads
87
Lift Cylinder
88
Lift Cylinder Wear Block
90
Mast Coil Cord
90
Troubleshooting and Repair Procedures Shall be Completed by a Person Trained and Qualified on the Repair of this Machine
91
Immediately Tag and Remove from Service a Damaged or Malfunctioning Machine
91
Repair any Machine Damage or Malfunction before Operating the Machine
91
Before Troubleshooting
91
Read, Understand and Obey the Safety Rules and Operating Instructions in the Appropriate Operator's Manual on Your Machine
91
Be Sure that All Necessary Tools and Test Equipment Are Available and Ready for Use
91
Could Result in Death or Serious
91
Injury. Remove All Rings, Watches
91
And Other Jewelry
91
Bodily Injury Hazard. Spraying
91
General Repair Process
92
GCON I/O Map
93
Operational Indicator Codes
94
A Troubleshooting "HXX" and "PXXX" Faults
95
Fault Inspection Procedure
96
Type "HXXX" Faults
98
Type "PXXX" Faults
99
Type "UXXX" Faults
100
Type "FXXX" Faults
101
Type "CXXX" Faults
102
Schematics
103
Electrical Component and Wire Color Legends
104
Wiring Diagram - Ground and Platform Controls
105
Electrical Symbols Legend
106
Electrical Schematic (from Serial Number GRC11-1000 to GRC11-1078)
107
Electrical Schematic (from Serial Number GRC11-1079)
108
Hydraulic Component Reference and Symbols Legend
115
Hydraulic Schematic
116
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Genie GRC-12 Specifications
General
Brand
Genie
Model
GRC-12
Category
Lifting Systems
Language
English
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