JCB Vibromax 752 Tandem Drum Roller Service Repair Manual
Sample Page From The Manual:
JCB Vibromax 752 Tandem Drum Roller Service Repair Manual
The instrumentation panel components receive power from terminal 15/54, through Fuse F1, provided the key switch is in the ON position. The P3 engine temperature indicator [line 8] is controlled by the variable resistor R1. Engine oil pressure indicator light H5 [line 9] will illuminate provided the normally closed engine oil pressure switch S6 is closed [line 9]. The hydraulic oil filter indicator light H6 [line 9a] will illuminate if the normally open S5 pressure switch [line9a] is closed. The H4 brake on indicator light will illuminate until brake release pressure becomes great enough to open the normally closed switch S8 [line 10]. The H1 horn will sound if the normally open switch S3 is depressed. The H1 horn is also a warning indicator for the brake circuit, sounding if the running machine is placed in forward or reverse while the S8 pressure switch [line 10] is closed (K15 is controlled by the neutral start switch while K16 closes when the engine is running and the alternator is producing current [line 10a]). Diode V6 prevents the brake on indicator lamp from illuminating when the horn switch is depressed. Diode V7 performs the same function for the engine temperature indicator light. The engine temperature light (H9) illuminates if pressure switch S2 is closed due to high engine temperature. The H2 back up alarm [line 12] receives power from fuse F1 at the neutral start switch [line 6] through the back up alarm pressure switch S10 [line 12]. The S10 pressure switch is located on the propulsion pump reverse travel control.
Table of Contents:
JCB Vibromax 752 Tandem Drum Roller Service Repair Manual
SECTION ONE
GENERAL INFORMATION
MACHINE DESCRIPTION 1 – 3
MACHINE SERIAL NUMBERS 1 – 5
IDENTIFYING MACHINE COMPONENTS 1 – 6
MACHINE SPECIFICATIONS 1 – 8
STANDARD TORQUE DATA 1 – 10
FLUID CAPACITY – 752 1 – 12
DIESEL FUEL SPECIFICATION 1 – 13
ENGINE OIL SPECIFICATION 1 – 14
ROLLOVER PROTECTION STRUCTURE 1 – 15
SAFETY, GENERAL 1 – 16
SPARK ARRESTER 1 – 16
SAFETY, PERSONAL 1 – 17
SAFETY, MACHINE OPERATION 1 – 19
SAFETY, MAINTENANCE 1 – 22
SAFETY, DECALS 1 – 23
SECTION TWO
ENGINE
ENGINE DATA 2 – 2
CUMMINS ENGINE WARRANTY 2 – 3
ENGINE REMOVAL 2 – 4
SECTION THREE
ELECTRICAL
INSTRUMENT PANEL, RIGHT 3 – 2
INSTRUMENT PANEL, LEFT 3 – 4
INSTRUMENT PANEL COVER 3 – 5
COMBINATION INDICATOR 3 – 6
SPEED RANGE CONTROL 3 – 7
UNDERSTANDING ELECTRICAL SCHEMATICS 3 – 11
UNDERSTANDING RELAYS 3 – 14
VIBROMAX RELAYS 3 – 15
STARTER/CHARGING CIRCUIT 3 – 17
UNDERSTANDING BATTERIES 3 – 17
BATTERY DIAGNOSTICS 3 – 18
UNDERSTANDING ALTERNATORS 3 – 19
CHARGING SYSTEM DIAGNOSTICS 3 – 20
VOLTAGE CHECKS AT ALTERNATOR 3 – 21
SYSTEM LEAKAGE 3 – 21
CIRCUIT WIRING TEST 3 – 21
MEASURING ALTERNATOR OUTPUT 3 – 22
UNDERSTANDING STARTERS 3 – 22
STARTER SOLENOID 3 – 23
STARTER SYSTEM DIAGNOSTICS 3 – 23
SOLENOID CIRCUIT TEST 3 – 23
STARTER CIRCUIT WIRING TEST 3 – 24
STARTER MOTOR TEST 3 – 25
INSTRUMENTATION PANEL 3 – 27
LIGHTING CIRCUIT 3 – 29
WATER SPRINKLER CIRCUIT 3 – 31
VIBRATION/DRUM SELECTION CIRCUITS 3 – 33
VIBRATION CONTROL CIRCUIT 3 – 35
TWO SPEED PROPULSION MOTOR CIRCUITS 3 – 37
WIRE CHART, RIGHT PANEL & HARNESS 4010/67455 3 – 44
WIRE CHART, LEFT PANEL & HARNESS 4010/67413 3 – 46
WIRE CHART, FRONT HARNESS 4010/67336 3 – 48
WIRE CHART, REAR HARNESS 4010/68335 3 – 49
SECTION FOUR
HYDRAULIC
PROPULSION SYSTEM 4 – 5
VIBRATION SYSTEM 4 – 9
STEERING SYSTEM 4 – 13
BRAKE CIRCUIT 4 – 17
HYDRAULIC AND COOLING LINES 4 – 18
HYDRAULIC DRAIN SYSTEM 4 – 20
HYDRAULIC SYSTEM COMPONENTS 4 – 22
PRESSURE TEST POINTS 4 – 22
HYDRAULIC SCHEMATIC 4 – 23
SECTION FIVE
POWER TRAIN
752 DRUM ASSEMBLY 5 – 2
DRUM REMOVAL 5 – 9
DRUM INSTALLATION 5 – 10
DRUM DRIVE BEARING REMOVAL 5 – 11
DRUM DRIVE BEARING ASSEMBLY 5 – 13
DRUM DRIVE MOTOR REPAIRS 5 – 14
DRUM DRIVE GEARBOX 5 – 15
GFT 17 T2/312 2 GEARBOX 5 – 17
SECTION SIX
PARKING BRAKE SYSTEM
BRAKE CIRCUIT 6 – 6
TOWING YOUR MACHINE 6 – 7
SECTION SEVEN
VIBRATION SYSTEM
LIFTING DEVICE 7 – 2
DRUM EXCITER SHAFT 7 – 3
752 VIBRATION SYSTEM 7 – 4
VIBRATION SYSTEM 7 – 7
VIBRATION FREQUENCY 7 – 8
VIBRATION AMPLITUDE 7 – 9
VIBRATORY SYSTEM DIAGNOSTICS 7 – 10
752 DRUM DRAWING 7 – 11
DRUM – LEFT SIDE 7 – 12
DRUM – RIGHT SIDE 7 – 15
DRUM REMOVAL 7 – 18
DRUM INSTALLATION 7 – 19
RIGHT SIDE BEARING COVER 7 – 20
EXCITER BEARING REMOVAL 7 – 21
EXCITER BEARING ASSEMBLY 7 – 23
SECTION EIGHT
STEERING SYSTEM
STEERING SYSTEM 8 – 5
STEERING PIVOT REMOVAL 8 – 6
STEERING CYLINDER 8 – 10
SECTION NINE
CHASSIS
REAR ENGINE/ROLLER FRAME 9 – 2
FRONT ROLLER FRAME 9 – 3
STEERING LINK 9 – 4
FRONT WATER/DIESEL TANK 9 – 5
REAR WATER/HYDRAULIC TANK 9 – 6
INSTRUMENT CONSOLE 9 – 7
SEAT RACK 9 – 8
ROLLOVER PROTECTION STRUCTURE (ROPS) 9 – 9
SECTION TEN
ATTACHMENTS
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