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Manitowoc Grove RT770E Service Maintenance Manual
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BOOM
RT770E SERVICE MANUAL
4-44
Published 11/26/2014, Control # 447-05
FIGURE
4-
60
4, 5
1
2
3
7
A
B
Detail
B
Detail A
6
8
8
Item
Desc
ription
1
Capscrew
2
Locknut
3
Shaft
4
Capscrew (2)
Item
Description
5W
a
s
h
e
r
(
2
)
6
S
top Plate
7
Shaft
8
Grease Fitting (2)
187
189
Table of Contents
Table of Contents
7
Section 1 1
15
Overview of Manuals
15
Axle Weight Distribution
16
Basic Components
16
Customer Support
16
General Crane Design
16
Lifting Capacities (Load Chart)
16
Serial Number Location
16
Specific Crane Description
16
Transportation and Lifting Data
16
Axles
17
Brakes
17
Capacities
17
Dimensions
17
Engine
17
General
17
List of Specifications
17
Torque Converter
17
Transmission
17
Wheels and Tires
17
Hoists
18
Crane Nomenclature
21
After Cleaning
23
Cleanliness
23
Disassembly and Assembly
23
General Maintenance
23
Removal and Installation
23
Hoses and Tubes
24
Locking Devices
24
Pressing Parts
24
Shims
24
Wires and Cables
24
Batteries
25
Bearings
25
Gaskets
25
Hydraulic Systems
26
Hydraulic Fittings
27
Electrical System
28
Fatigue of Welded Structures
29
Loctite
29
Fasteners and Torque Values
30
Weld Studs
33
Dynamic Shock Loads
34
Environmental Conditions
34
General
34
Lubrication
34
Precautions and Recommendations During Inspection or Replacement
34
Wire Rope
34
Wire Rope Inspection (Running Ropes and pendant Cables)
35
Retraction Cables)
36
Wire Rope Inspection
36
Wire Rope Inspection (Boom Extension and Retraction Cables)
36
Wire Rope Inspection (Running Ropes and pendant Cables)
36
Wire Rope Inspection/Replacement
36
Wire Rope Inspection/Replacement (All Wire Rope)
36
Seizing Wire Rope
37
Installing 35X7 Class Wire Rope
38
Procedures for Cutting and Preparing 35X7 Class Wire Rope
38
Section 2 Hydraulic System 2
41
Section 2
41
Description
42
Description
43
Hydraulic Symbols
43
Draining and Flushing
45
Hydraulic Oil Recommendations
45
Hydraulic System Maintenance Precautions
45
Label Parts When Disassembling
45
Maintenance
45
Preparation
45
Removing Air from the Hydraulic System
46
Directional Control Valves
47
Parts Replacement
47
Visual Inspection of Hoses and Fittings
48
Description
49
Supply Pressure and Return Circuit
49
Pump Distribution
50
Troubleshooting
50
Troubleshooting Aids
52
Troubleshooting Procedures
52
Fill Cap/Breather
53
Hydraulic Oil Return Filter Assembly
53
Description
55
Maintenance
55
Oil Cooler
55
Oil Temperature Switches
55
Description
57
Hydraulic Pumps
57
Maintenance
57
Assembly
61
Disassembly
61
Pump Disconnect Assembly
61
Pressure Setting Procedures
63
Procedure a - Main Control Valve Reliefs
64
Procedure B - Main Directional Control Valve Pilot Supply Pressure
65
Procedure C - Swing Brake Pilot Supply Pressure
65
Procedure D - Brake Charge Supply Valve Relief Pressure
65
Procedure E - Charge Air Cooler Valve Relief Pressure
66
Procedure F - Brake Dual Accumulator Charge Valve Pressure Limits
66
Procedure G - Accumulator Pre-Charge Pressure
66
Procedure H - Precharging the Accumulator
67
Procedure I - Swing Valve Work Port Reliefs Pressure
67
Procedure J - Front Steer Relief Valve Pressure
68
Procedure K - Outrigger/Rear Steer Valve
68
Procedure K - Outrigger/Rear Steer Valve Relief
68
Procedure L - Hydraulic Oil Cooler Fan Motor Control Valve
68
Relief
68
Procedure M - Counterweight Removal Valve
69
General
70
Valves
70
Description
73
Directional Control Valves
73
Maintenance
73
Description
78
Hydraulic Remote Control Valve
78
Maintenance
78
Description
82
Dual Accumulator Charge Valve
82
Maintenance
82
Description
84
Maintenance
84
Swing Brake and Armrest Lockout Valve
84
Description
86
Holding Valve
86
Maintenance
86
Description
87
Outrigger/Rear Steer Valve
87
Maintenance
88
Outrigger Control Manifold
89
Maintenance
90
Description
91
Maintenance
91
Parking Brake/Range Shift Valve
91
Axle Oscillation Lockout Valve
93
Description
93
Maintenance
93
Description
94
High Speed Boost Selector Valve
94
Maintenance
94
Description
95
Maintenance
95
Telescope Stage Selector Valve Manifold
95
Description
96
Telescope Fill Tube Control Valve Manifold
96
Maintenance
97
Description
98
Hydraulic Accumulator
98
Maintenance
98
Description
99
Maintenance
99
Service Brake and CAC Fan Motor Priority
99
Description
100
Maintenance
100
Oil Cooler Fan Motor Priority Flow Control
100
Cylinders
101
General
101
Maintenance
101
Temperature Effects on Hydraulic Cylinders
102
Description
104
Lift Cylinder
104
Maintenance
104
Description
108
Maintenance
108
Telescope Cylinder
108
Axle Oscillation Lockout Cylinder
109
Description
109
Maintenance
109
Description
112
Maintenance
112
Steer Cylinder
112
Description
115
Maintenance
115
Outrigger Extension Cylinder
115
Description
118
Maintenance
118
Outrigger Jack Cylinder
118
Counterweight Removal Cylinder
121
Description
121
Maintenance
121
Section 3 Electrical System
125
Batteries
127
Cab Electrical Panel
127
Carrier Electrical Panel
129
General
131
Maintenance
131
Connector Troubleshooting
132
General Troubleshooting
132
Problems
132
Tools for Troubleshooting
132
Troubleshooting Swivel-Caused Electrical
132
Alternator/Charging System Troubleshooting
133
Alternator Replacement
135
Starter Replacement
135
Battery Replacement
136
Relay Panel Component Replacement
136
Gauge Cluster Replacement
137
Rocker Switch Replacement
137
Ignition Switch Replacement
138
Turn Signal Lever and Transmission Shift Lever Replacement
139
Windshield Wiper Assembly Replacement
140
Skylight Wiper Assembly Replacement
142
Windshield Washer Assembly Replacement
142
Air Conditioner
143
Beacon Light
143
Boom Mounted Floodlights
143
Cold Weather Operation
143
Optional Equipment
143
Rear View Mirror
143
Tools for Troubleshooting
143
Rt770E Service Manual Boom Section 4 Boom
145
Theory of Operation
146
Maintenance
148
Removal
148
Disassembly
157
Assembly
165
Boom Nose Sheaves
165
Installation
176
Boom Alignment and Servicing
177
Boom Extension and Retraction Cables
177
Functional Check
177
Inspection
177
Maintenance
177
Adjustment
178
Description
181
Telescope Circuit
181
Theory of Operation
181
Maintenance
183
Disassembly and Assembly
184
Removal and Installation
184
Description
185
Lift Circuit
185
Maintenance
185
Theory of Operation
185
Disassembly and Assembly
187
Lift Cylinder Installation
187
Lift Cylinder Removal
187
Bi-Fold Boom Extension
189
Boom Extension Rigging Mode
189
Description
189
Erecting the Boom Extension
189
Stowing the Boom Extension
196
Setting the Folding Swingaway Offset
198
Boom Extension Alignment Device Adjustment
199
Swingaway Mounting Adjustment
199
Description
200
Hook Block
200
Section 5 Hoist and Counterweight
201
Maintenance
202
Description
204
Fluid Level
204
Functional Check
204
Installation
204
Removal
204
Preventative Maintenance
206
Usage and Inspection
206
Oil Sampling
207
Brake Test Procedure
208
Hoist to Boom Alignment
209
Preparation
209
Tools Required
209
Motor and Brake
211
Description
212
Idler Drum and Cable Follower
212
Description
215
Maintenance
215
Third Wrap Indicator
215
Description
216
Hoist Drum Rotation Indicator System
216
Hoist Rotation Indicator (HRI) and Display
216
Maintenance
216
System
216
Description
218
Hoist Rotation Indicator (HRI) Display System
218
Description
219
Hoist Control Valves
219
Counterweight Plate
220
Description
220
Fixed Counterweight
220
Maintenance
220
Installation
222
Removable Counterweight (Optional)
222
Removal
222
Rt770E Section 6 Swing System
225
Description
226
Maintenance
227
Description
231
Maintenance
231
Swing Motor
231
Description
232
Maintenance
232
Swing Gearbox and Brake
232
Description
234
Maintenance
234
Swing Bearing
234
Description
239
Swivels
239
Description
241
Hydraulic Swivel
241
Maintenance
241
Theory of Operation
241
Description
243
Maintenance
243
Two Port Water Swivel
243
Description
244
Electrical Swivel
244
Maintenance
244
Theory of Operation
244
360° Swing Lock Control (Positive Lock Type)
246
Description
246
Maintenance
246
Swing Lock Pin
246
Caution
247
Description
250
Electronic Control System
250
Engine Control System Switches and Indicator Lights
250
Fuel System
253
Description
254
Air Intake
255
Air Intake and Exhaust System
255
Description
255
Charge-Air Cooler System
259
Muffler
260
Description
263
Maintenance
263
Water Cooling System
263
Radiator Fill and Servicing
267
Description
269
Drive Train
269
Maintenance
269
Description
271
Theory of Operation
271
Transmission/Torque Converter
271
Maintenance
272
Troubleshooting Procedures
272
Towing or Pushing
275
Section 8 Undercarriage
277
Description
280
Maintenance
280
Typical Wear Patterns
280
Wheels and Tires
280
Description
283
Steering Systems
283
Theory of Operation
283
Maintenance
284
Rear Steering System
285
Troubleshooting
285
Front Steering Control Valve
286
Hydraulic Pumps
286
Integrated Outrigger/Rear Steer Control Valve
286
Steer Cylinders
286
Description
287
Rear Axle Oscillation Lockout System
287
Theory of Operation
287
Axle Oscillation Lockout Cylinders
289
Axle Oscillation Lockout Valve
289
Brake System
289
Maintenance
289
Description
292
Maintenance
292
Service Brakes
292
Corrosion Protection
296
Description
298
Maintenance
298
Parking Brake Actuator
298
Description
299
Maintenance
299
Parking Brake
299
Description
302
Maintenance
302
Outrigger
302
Outrigger Circuit
302
Park Brake Solenoid Valve
302
Maintenance
303
Outrigger Beam
306
Extension Cylinder
310
Outrigger Monitoring System
310
Standard in North America)
310
Jack Cylinder
311
Outrigger Control Valves
312
Section 9 Lubrication
313
Arctic Lubricants and Conditions
315
Surface Protection for Cylinder Rods
318
Wire Rope Lubrication
318
Cranelube
319
Lubrication Points
319
Safety
319
Steering and Suspension
320
Drive Train
324
Drive Train (Continued)
326
Turntable
328
Outriggers
330
Boom
335
Boom (Continued)
337
Boom (Continued)
340
Boom (Continued)
342
Hoist
344
Hydraulic
346
Carwell® Rust Inhibitor
349
Cleaning Procedures
349
Protecting Cranes from Rusting
349
Application
350
Areas of Application
350
Inspection and Repair
350
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Manitowoc Grove RT770E Specifications
General
Brand
Manitowoc
Model
Grove RT770E
Category
Construction Equipment
Language
English
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