JAKE BRAKE 680A, 680B Service Manual

Models
680A/B
The Model 680A Jake Brake® engine retarder is designed and approved for use on Mack® E6 engines with four-valve cylinder head configuration. The Model 680B is designed and approved for use on Mack E7 engines. Information in this manual was current at the time of printing and is subject to change without notice or liability.
Refer to the Installation Manual, P/N 018061, Jacobs Service Letters and instructional literature for specific application information.
PARTS MANUAL
Models 680A and 680B Housing Assemblies
Engine Packaged
Brake Housing
Model P/N Description
680A 017045 Front housing assembly 680A 017046 Rear housing assembly 680B 01-017013 Front housing assembly 680B 01-017014 Rear housing assembly
Ill. Part Qty./
No. No. Part Name Hsg.
1 016440 Solenoid valve assembly 1 2 001081 Upper seal ring 1 3 001082 Center seal ring 1 4 001083 Lower seal ring 1 5 011930 Control valve spool assy. 3 6 012757 Control valve cover 2 7 001492 Hex head screw 5 8 010843 Stop spring 3 9 003109 Inner spring, 680A 3 9 007500 Inner spring, 680B 3
10 017008 Slave piston 3 11 013418 Outer spring 3 12 013417 Inner spring 3 13 014247 Spring retainer 3 14 001023 Retaining ring 3 15 001026 Hex nut 3 16 016997 Safety screw 3 17 014103 Master piston 3 18 002030 Flat spring 3 19 001030 Flat washer 3 20 017368 Harness 1
20
7
6
1
8
9
15
16
2
5
3
4
11
17
18
19
10
7
12
13
14
Attaching Parts Group
Ill. Part Qty./
No. No. Part Name Hsg.
013716 Hsg. Attach. Parts Grp. - 680A 1
1 013535 • Hex head bolt, SAE 12 2 013569 • Hex head bolt, SAE 6 3 013414 • Adjusting screw, SAE 6 4 013736 • Oil supply screw (3/8 x 16) 2 5 002411 • “O” ring 2
017015 Hsg. Attach. Parts Grp. - 680B 1
1 019298 • Hex head bolt, metric 12 2 017009 • Hex head bolt, metric 6 3 017011 • Adjusting screw, metric 6 4 013736 • Oil supply screw (3/8 x 16) 2 5 002411 • “O” ring 2
020453 Spacer Group, 680A & 680B 2
6 018663 • Spacer 1 7 017366 • Electrical connector 1 8 019841 • Gasket 1
NI 014690 Hose, 3/16 ID x 31 long 1
020407 Yoke Group, 680B 1
9 017710 • Yoke 6
019470 Yoke Group, 680A 1
9 017710 • Yoke 6 10 019467 • Adjusting screw 6 11 019468 • Hex nut 6
2
1
6
8
3
5
7
9
10
11
4
2 PARTS MANUAL FOR MODELS 680A/B
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