CAT Articulated Truck 725 Specifications Page 11
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112 SEBU8524
Maintenance Section
Braking System - Test
i03579861
Braking System - Test
SMCS Code: 3077-081; 4251-081; 4267-081
Personal injury can result if the machine moves
while testing.
If the machine begins to move during test, reduce
the engine speed imme diately and engage the
parking brake.
The service brake holding ability test determines
whether the service brake is functional. This test is
not intended to measure the maximum brake holding
ability.
The holding ability of the service brakes at a specific
engine rpm will be different for each machine.
The results of the test should be recorded. The
results should be compared to previous test results
and subsequent test results. Use the comparison as
an indication of system deterioration for a particular
machine.
1. Before you perform the test, ensure that you can
testthebrakesonasurfacewhichislevel,dry,
and clear of obstacles. Fasten your seat belt.
Ensure that the transmission control is in the N
position and that the parking brake control is in
the ENGAGED position.
Start the engine and wait until the brake system is
fully charged.
2. Engage the service brakes. Move the transmission
control to the 1 position. Move the parking brake
control to the DISENGAGED position.
3. Gradually increase the engine speed until the
machine moves forward. Record the engine speed
when the machine moves.
Reduce the engine speed immediately and move
the parking brake control to the ENGAGED
position. Move the transmission control to the N
position. Shut off the engine.
4. If the machine moves at an engine speed below
1200 rpm, the service brakes require service.
NOTICE
If the machine
moved while testing the service brakes,
contact your Caterpillar dealer.
Have the deale
r inspect and, if necessary, repair the
service brakes before returning the machine to oper-
ation.
Parking Brake Check
The test for
the parking brake must be carried out with
the rated load in the truck body or OEM attachment.
Test the s e
rvice brakes and the secondary steering
system on level ground before you carry out this
procedure.
1. Drive the machine onto an incline of 15%. The
machinemustbepointingdowntheincline.
2. Engage the service brakes in order to stop
the machine on the incline. The area around
the mach
ine must be clear of personnel and
obstacles.
3. Move the
parking brake control to the ENGAGED
position. Move the transmission control to the N
position.
4. Shut off the engine.
5. Gradua
lly disengage the service brakes.
6. If the machine moves forward, engage the service
brake
s immediately. Start the engine. Disengage
the parking brake and drive the machine onto
level ground. Shut off the engine.
7. Check the thickness of the brake pad linings
and check the thickness of the brake disc. Refer
to Sp
ecifications, RENR6724, “Parking Brake”.
Replace parts if the specification is not met.
If th
e machine moved during the test, the parking
brake requires service.
NOTICE
If the machine moved while testing the parking brake,
inspect the parking brake components for wear or
damage. Repair or replace the worn or damaged park-
ing brake components as required before returning the
machine to service.
- MAINTENANCE INTERVALS 1
- Operation and 2
- Maintenance 2
- Maintenance Interval Schedule 3
- Autom atic Lubrication Grease 5
- Tank - Fill 5
- (If Equipped) 5
- Grease Recommendations 6
- Backup Alarm - Test 7
- Battery - Recycle 7
- Battery or Battery Cable 7
- Inspect/Replace 7
- Body Pivot Bearings 8
- Brake Pads - Check 9
- Brake System Air - Pu rge 10
- Braking System - Test 11
- Illustration 126 12
- Illustration 127 12
- Illustration 128 12
- Circuit Breakers - R eset 13
- Cooling System Coolant (ELC) 13
- Illustration 131 14
- Illustration 132 14
- Illustration 130 14
- Coo ling System Coo lant 15
- Extender (ELC) - Add 15
- - C heck 15
- Illustration 135 16
- Illustration 137 17
- Illustration 138 17
- Cranksh aft Vibration Dam per 18
- - Change 19
- Level - C h eck 20
- Illustration 146 21
- Inspect/Repl 22
- Engine Air Filter Primary 23
- Element-C 23
- Engine Air Filte r Secon dary 24
- Element - Replac e 24
- Engine Cran kcase Breather 24
- Engine Oil L evel - Ch eck 25
- Engine Oil Sampl e - Obtain 25
- Illustration 156 28
- Illustration 157 28
- Illustration 158 28
- Engine Valve L ash - Check 29
- Ether Starting Aid Cylinder 30
- (OEM Attachmen t if Equipped) 30
- Front Frame 31
- Front Suspension Frame 31
- Oscillating Hitch 31
- Rear Frame 32
- Rear Frames 32
- Dump Body 32
- Radiator Mounts 32
- Mounts for the Suspension 32
- Fuel Sy stem 33
- Fuel System Primary Filter 34
- Illustration 170 35
- Illustration 171 35
- Fuel Syst 36
- Fuel Tank Cap and Strainer 36
- Fuel Tank Water and Sediment 37
- Fuses - Re place 38
- Hoist C ylinder Bearing s 39
- Lubricate 39
- Illustration 178 40
- Illustration 179 40
- Illustration 180 40
- Hydrauli 41
- Hydraulic System Oil Level 42
- Hydrau lic System Oil Samp le 43
- Hydrau lic Tank Breat her 43
- Clean/Inspect/Replace 43
- Hydrau lic Tank Strainer 44
- Clean/Insp ec 44
- Oscillating Hi tch - Ad just 44
- Oscillating Hitch - Lubricate 45
- Radiator Core - Clea n 46
- Refrig erant Dryer - Replace 47
- Rollover Protective Structure 47
- (ROPS) - Inspect 47
- Seat Belt - Insp ect 49
- Seat Belt - Replace 49
- Secondary Steering - Test 49
- Steering Cylinder Bearings 50
- Suspension System - Check 51
- Suspension and Su spen sion 51
- Cylinder Bear 51
- Tire Inflation - Ch eck 52
- Torque Converter and 52
- Transmission O il - Change 52
- Illustration 213 53
- Illustration 214 53
- Illustration 215 53
- Ecology Dr ain 54
- Transmission 55
- Oil Filter 55
- Oil Level 56
- Torque Con 57
- Transmission O il S ample 57
- Illustration 224 58
- Illustration 225 58
- Tran sfer G ear Oil Filter 59
- Illustration 230 60
- Illustration 229 60
- Transfer Gear Oil Samp le 61
- Illustration 232 62
- Illustration 233 62
- Illustration 234 62
- Windows - Clean 63
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