Dorman M630788 brake master cylinder for the 1991-1994 Isuzu NPR turns pedal force into hydraulic pressure for the brakes. This Dorman brake master cylinder is precision-engineered to follow the design, function and performance of the original unit on this model.
- Aluminum cylinder housing, cast to the same casting material as the original part
- All rubber components made of EPDM compound for resistance to glycol-based brake fluid
- Made entirely of new materials
- Made to meet rigorous SAE International standards
Quick facts
- Part: Dorman M630788 brake master cylinder
- Fits: 1991-1994 Isuzu NPR
- Material: Aluminum
- Condition: New
A fluid film on the cylinder body or brake lines, a low reservoir level, or a soft or sinking pedal can point to a worn master cylinder. Leaks elsewhere in the brake system or air in the lines produce similar symptoms. With the engine off, look over the cylinder and lines for wetness and check the reservoir level first; a shop can test the rest.
Fits
It is a direct-fit master cylinder for the 1991-1994 Isuzu NPR, which takes one. This listing is a single unit.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 1.25 in
- Number of outlets: 2
- Rearward outlet size: M10 x 1.0
- Secondary outlet thread diameter: M10 x 1.0
- Primary outlet thread pitch: 1 mm
Build and materials
- Material: Aluminum
- Rubber components: EPDM compound
- Condition: New
- Country of origin: China
In the box
One master cylinder. The reservoir, sensor and mounting hardware are not included, so plan on new mounting hardware rather than reusing the old pieces.
Interchange: 10-4436 · 130.76006 · 355-37017
MC390229 · F141832 · MC141832
This part cross-references / interchanges with the following part numbers:
10-4436, 130.76006, 355-37017, MC390229, F141832, MC141832
Frequently Asked Questions
Is this a master cylinder replacement for the 1991-1994 Isuzu NPR?
Yes. Dorman M630788 is a direct-fit replacement for the 1991-1994 Isuzu NPR, which takes one.
Does this Dorman master cylinder come with the reservoir?
No. This listing is one master cylinder; the reservoir, sensor and mounting hardware are not included.
What bore size and outlet thread does this brake master cylinder have?
Dorman M630788 has a 1.25 in bore and two outlets with M10 x 1.0 threads, and a primary outlet thread pitch of 1 mm.
Can the rubber parts in this master cylinder handle glycol-based brake fluid?
Yes. The rubber parts in this master cylinder are EPDM compound, which resists glycol-based brake fluid.
Does this brake master cylinder meet SAE standards?
Yes. Dorman M630788 is built to SAE International standards.
