R2900 G LOAD HAUL DUMP GLK00001-UP (MACHINE)(SEBP3604 - 09) - Docume...

Page 1 of 6

Previous Screen

Welcome: k680abr

Product: LOAD HAUL DUMP

Model: R2900G LOAD HAUL DUMP GLK
Configuration: R2900 G LOAD HAUL DUMP GLK00001-UP (MACHINE)

Operation and Maintenance Manual

R2900G Load Haul Dump
Media Number -SEBU7330-01 Publication Date -01/12/2003 Date Updated -15/12/2003

i02007660

Brake Release - If Equipped

SMCS - 4267

Certain Caterpillar machines fitted with remote controls may be equipped with an optional brake
release system. The brake release system is used to recover a machine from a stope or dangerous area.

If the parking brake is engaged due to a machine fault, or if the machine becomes partially buried in a
rock fall, the brake release system can be used to disengage the parking brake to enable the machine
to be towed.

If the recovery machine is equipped with a recovery bar, the recovery bar can be used to activate the
brake release system. If the disabled machine is equipped with a recovery hook, the recovery hook
can be used to activate the brake release system.

Brake Release with the Recovery Bar

If the disabled machine is in a stope or dangerous area, the recovery

machine must be operated by remote control.

The brake release system must only be activated by a recovery bar

securely attached to the recovery machine. The recovery bar must be
securely attached to the hitch of the disabled machine prior to
activating the brake release system. Failure to securely attach the
recovery bar may result in the disabled machine moving. Uncontrolled

https://sisweb.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis... 07/29/14
R2900 G LOAD HAUL DUMP GLK00001-UP (MACHINE)(SEBP3604 - 09) - Docume... Page 2 of 6

movement of the disabled machine can cause serious personal injury or

death.

When the disabled machine has been towed to a safe place, ensure that
the machine is parked on level ground and the wheels are blocked
securely. Be sure that the machine can not move before performing any
service work on the machine.

Ensure that the disabled machine cannot move before disconnecting the
recovery bar.

Illustration 1 g00901945

The brake release system is activated by a recovery bar attached to a recovery machine. The recovery
bar depresses piston (1). When the piston is depressed, the parking brake will be disengaged.

Perform the following steps to activate the brake release system and to recover a disabled machine.

Illustration 2 g00901998

https://sisweb.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis... 07/29/14
R2900 G LOAD HAUL DUMP GLK00001-UP (MACHINE)(SEBP3604 - 09) - Docume... Page 3 of 6

Attachment of recovery bar to bucket

(2) Recovery bar

(3) Weld-on adapter plate

(4) Bucket lower lip

(5) Bolts

1. Attach recovery bar (2) to the bucket of the recovery machine, as shown in the above
illustration.

Note: Some types of bucket hardware allow direct bolt-on fastening of the recovery bar to the
bucket. For more information on attaching the recovery bar to the bucket, contact your
Caterpillar dealer.

2. Position the recovery machine at the rear of the disabled machine.

Illustration 3 g00902000

3. Guide the recovery bar into the hitch of the disabled machine.

4. Lift and tilt back the bucket on the recovery machine until the recovery bar depresses the piston
of the brake release cylinder. The parking brake on the disabled machine will be disengaged
when the piston is fully depressed.

Once the brake release system is activated, the machines can roll freely.

Personal injury or death could result when towing a disabled machine

incorrectly.

https://sisweb.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis... 07/29/14
R2900 G LOAD HAUL DUMP GLK00001-UP (MACHINE)(SEBP3604 - 09) - Docume... Page 4 of 6

Ensure that the recovery machine is securely attached to the hitch with
the brakes applied to prevent the machines from rolling unexpectedly.
Keep all personnel clear of the disabled machine until it has been towed
to a safe place and the wheels securely blocked.

Illustration 4 g00902004

5. Use the recovery machine to tow the disabled machine to a safe place. Follow all the
precautionary steps outlined under the "Towing Information" section of this manual.

6. Block the wheels of the disabled machine prior to disconnecting the recovery machine and
performing any service work.

Brake Release with the Recovery Hook

If the disabled machine is in a stope or dangerous area, the recovery

machine must be operated by remote control.

The brake release system must only be activated by a tow line securely
attached to the recovery machine. The tow line must be securely
attached to the recovery hook of the disabled machine prior to
activating the brake release system. Failure to securely attach the tow
line may result in the disabled machine moving. Uncontrolled
movement of the disabled machine can cause serious personal injury or
death.

When the disabled machine has been towed to a safe place, ensure that
the machine is parked on level ground and the wheels are blocked

https://sisweb.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis... 07/29/14
R2900 G LOAD HAUL DUMP GLK00001-UP (MACHINE)(SEBP3604 - 09) - Docume... Page 5 of 6

securely. Be sure that the machine can not move before performing any
service work on the machine.

Do not use this recovery device for towing other machines or

equipment. Use of this hook may disengage the parking/secondary
brake.

Personal injury or death from crushing could result.

Marked tow devices should be used to tow other machines or

equipment.

Illustration 5 g00901966

Note: When towing other machines, attachments or equipment, only use towing points (1) at the rear
of the machine.

Note: The recovery hook brake release system will only operate when the engine is stopped.

The brake release system is activated by a pulling force applied to recovery hook (2). When the
pulling force is applied, the recovery hook will pivot and depress the piston of the brake release
cylinder. When the piston is depressed, the parking brake will be disengaged.

Perform the following steps to activate the brake release system and to recover a disabled machine.

1. Position the recovery machine at the rear of the disabled machine.

https://sisweb.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis... 07/29/14
R2900 G LOAD HAUL DUMP GLK00001-UP (MACHINE)(SEBP3604 - 09) - Docume... Page 6 of 6

2. Attach a tow line between the towing point of the recovery machine and recovery hook (2) of
the disabled machine.

Once the towing brake release system is activated, the machine can roll
freely.

Personal injury or death could result when towing a disabled machine

incorrectly.

Keep all personnel clear of the disabled machine until it has been towed
to a safe place and the wheels securely blocked.

3. Use the recovery machine to exert a smooth, gradual pulling force on the recovery hook. The
recovery hook will pivot and depress the piston of the brake release system. The parking brake
on the disabled machine will be disengaged when the piston is fully depressed.

4. Use the recovery machine to tow the disabled machine to a safe place. Follow all the
precautionary steps outlined under the "Towing Information" section of this manual.

5. Block the wheels of the disabled machine prior to disconnecting the recovery machine and
performing any service work.

Copyright 1993 - 2014 Caterpillar Inc. Tue Jul 29 15:06:58 UTC 2014
All Rights Reserved. k680abr
Private Network For SIS Licensees.

https://sisweb.cat.com/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sis... 07/29/14