Hummer H3. Manual — part 1328

Fig. 24: Chamfering Pipe Using De-Burring Tool
Courtesy of GENERAL MOTORS CORP.

9.

Strip the nylon coating from the brake pipe end to be flared, if necessary.

Select the appropriate blade on the coating stripping tool included in the J
45405 , by unthreading the blade block from the stripping tool and installing the
block with the desired blade facing the tool rollers.

6.35 mm (0.250 in) blade for 4.76 mm (3/16 in) diameter pipe

9.50 mm (0.374 in) blade for 6.35 mm (1/4 in) and 7.94 mm (5/16 in)
diameter pipe

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

Insert the brake pipe end to be flared into the stripping tool to the depth of the ledge
on the tool rollers.

While holding the brake pipe firmly against the stripping tool roller ledges, rotate the
thumbwheel of the tool until the blade contacts the brake pipe coated surface.

Rotate the stripping tool in a clockwise direction, ensuring that the brake pipe end
remains against the tool roller ledges.

After each successive revolution of the stripping tool, carefully rotate the thumbwheel
of the tool clockwise, in order to continue stripping the coating from the brake pipe
until the metal pipe surface is exposed.

Loosen the thumbwheel of the tool and remove the brake pipe.

Inspect the stripped end of the brake pipe to ensure that the proper amount of coating
has been removed.

6.35 mm (0.250 in) for 4.76 mm (3/16 in) diameter pipe

9.50 mm (0.374 in) for 6.35 mm (1/4 in) and 7.94 mm (5/16 in) diameter pipe

IMPORTANT: Do not gouge the metal surface of the brake pipe.

IMPORTANT: Ensure that all loose remnants of the nylon coating have

been removed from the brake pipe.

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

Fig. 25: Chamfering Pipe Using De-Burring Tool
Courtesy of GENERAL MOTORS CORP.

10. Chamfer the inside and outside diameter of the pipe with the de-burring tool included in the

J 45405 .

11. Install the tube nuts on the brake pipe, noting their orientation.

12. Clean the brake pipe and the J 45405 of lubricant, contaminants and debris.

13. Loosen the die clamping screw of the J 45405 .

14. Select the corresponding die set and install the die halves into the die cage with the full, flat

face of one die facing the clamping screw and the counterbores of both dies facing the
forming ram.

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

Fig. 26: Rotating J 45405 To Bottom Against Die Cage
Courtesy of GENERAL MOTORS CORP.

15. Place the flat face of an unused die (1) against the die halves in the clamping cage and hold

firmly against the counterbored face of the dies.

16. Insert the prepared end of the pipe to be flared through the back of the dies until the pipe is

seated against the flat surface of the unused die (1).

17. Remove the unused die (1).

18. Ensure that the rear of both dies are seated firmly against the enclosed end of the die cage.

19. Firmly hand tighten the clamping screw (2) against the dies.

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3