Overview
The Crown Automotive J8125534 is a caliper repair kit for 6 bolt front disc brake calipers on the 1977–1978 Jeep CJ5 and CJ7.
Crown Automotive supplies this kit with a seal and a boot, the two rubber parts that let a rebuilt caliper hold brake fluid and keep road dirt away from its piston. Rebuilding with a kit like this is the alternative to replacing a whole caliper when the housing and piston are still in good shape.
Crown describes itself as a maker of Jeep replacement parts with more than 8,000 part numbers, many of them discontinued by the factory. J8125534 is one of the older-Jeep items in that range and is marked as a direct fit for the front position.
A repair kit suits a caliper whose body and bore are still in good shape, since only the seal and boot are renewed. If the bore is pitted or the piston is scored, a complete caliper is the better choice. The kit is made for 6 bolt calipers, so check the caliper design before ordering.
Key features
- Repair kit for a 6 bolt disc brake caliper
- Contains a seal and a boot
- Front brake position
- Marked as a direct fit
- Covers the 1977–1978 CJ5 and CJ7
Inspecting the caliper before a rebuild
Before a rebuild, the caliper body should be examined for cracks, leaks at the bleeder, and corrosion around the piston bore. A bore with light surface rust can often be cleaned and honed, but deep pitting usually means the caliper should be replaced. The piston should slide smoothly and show no scoring, because a rough surface will tear a new seal quickly after assembly.
Slide pins and the mounting hardware are often overlooked during a caliper rebuild, yet they affect how evenly the pads wear. Clean the pins, check their boots, and use only the lubricant recommended for brake hardware. Lubricate the new seal and boot lightly so they do not twist during installation.
- Look for cracks and leaks around the bleeder and body
- Check the piston for scoring before reusing it
- Inspect slide pins and their boots
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J8125534 |
| UPC | 848399068115 |
| Part type | Disc brake caliper repair kit |
| Caliper design | 6 bolt caliper |
| Position | Front |
| Fit type | Direct fit |
Vehicle fitment
Crown Automotive lists J8125534 for two vehicles only: the 1977–1978 Jeep CJ5 and the 1977–1978 Jeep CJ7. Both are front disc brake applications.
Other CJ5 and CJ7 model years are not on that list, and neither is any other Jeep. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
A caliper rebuild means opening the hydraulic circuit. Plan to bleed the front brakes afterward and check the pedal before the Jeep is driven. A piston is not part of this kit, so the existing one has to be reusable.
What’s included
- One seal
- One boot
Not included: Caliper piston, brake pads and brake fluid.
