Jacobs CBRAKE 490 User Manual

3
THE 490A BRAKE IS APPROVED FOR USE ON THE
ISC07 AND ISC 2010 ENGINE ONLY. THE 490A
BRAKE IS NOT APPROVED FOR USE ON PRIOR ISC
ENGINE MODELS.
Multiple valve cover options are available. Please contact
your local Cummins dealer for valve cover part numbers for
your specific engine. The valve cover is not included in the
aftermarket kit and should be ordered separately.
Turbocharger Compatibility
When installing an engine brake on the ISL engine a new
turbo actuator is required due to increased backpressure.
Contact your local Cummins dealer for updates regarding the
correct turbo actuator group part number for your engine.
Brake Part
Number
Description
Engine Brake
Compatible
3945615
Front Oil Fill,
Valve Cover
No
3945436
Front Oil Fill,
Valve Cover
Ye s
3945834
Rear Oil Fill,
Valve Cover
Ye s
3945833
Rear Oil Fill,
Valve Cover
No
3945970
Rear Oil Fill,
Valve Cover
Ye s
3945971
Front Oil Fill,
Valve Cover
Ye s
3945834
No Oil Fill,
Valve Cover
Ye s
Special Tools
The following special tools should be available for the instal-
lation:
1. Torque 6 in-lb wrench, Cummins P/N 3376592.
2. Engine Barring tool, Cummins P/N 5299073.
3. Feeler gage/slave piston:
Cummins P/N 3613681, (0.090”)
Cummins P/N 5572956, (0.067”) for L9 2021
Recommended Torque
Values
Mounting Spacer 60 N.m (45 lb-ft.)
Hexagonal Flange Head
cap screw (P/N 3945232) 60 N.m (45 lb-ft.)
Oil Supply Screw 7 N.m (5 lb-ft.)
Hexagonal Flange Head
cap screw (P/N 3927064) 32 N.m (23 lb-ft.)
Cap, Adj Nut 35 N.m (25 lb-ft.)
Nut, Valve Adj 35 N.m (25 lb-ft.)
Nut, D-Lash 35 N.m (25 lb-ft.)
UNLESS OTHERWISE SPECIFIED, THE
TORQUE VALUES LISTED IN THE TEXT
ARE DIRECT VALUES USING NO TORQUE
WRENCH ADAPTERS OR EXTENSIONS.
WHEN ADAPTERS OR EXTENSIONS ARE
USED WITH A TORQUE WRENCH, THE
TORQUE VALUES MUST BE ADJUSTED
FOR THE SPECIFIC TOOLS BEING USED.
FOLLOW THE MANUFACTURER’S RECOM-
MENDED PROCEDURES FOR THE TORQUE
WRENCH AND ADAPTER BEING USED.
Automatic
Transmissions
PRIOR TO INSTALLATION OF THE ENGINE
BRAKE ON VEHICLES WITH AUTOMATIC
TRANSMISSIONS, WE RECOMMEND THAT
THE TRANSMISSION MANUFACTURER
REPRESENTATIVE (DEALER) BE
CONSULTED TO BE SURE OF THE
COMPATIBILITY OF THE ENGINE BRAKE
WITH THE SPECIFIC AUTOMATIC
TRANSMISSION BEING USED.

Jacobs CBRAKE 490 Specifications

General

Brand	Jacobs
Model	CBRAKE 490
Category	Spring Applied Brakes
Language	English