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| * single reservoir, used with economy drum-brake models | * single reservoir, used with economy drum-brake models | ||
| + | |||
| + | = Larger Master Cylinder = | ||
| Some club members are using a 13/16 master cylinder from the B310. This increases pedal effort, but reduces pedal travel for a "tighter" feel. Discussion: [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=29055&forum=1 Is anyone running a 13/16 master cyl w/out a booster?] | Some club members are using a 13/16 master cylinder from the B310. This increases pedal effort, but reduces pedal travel for a "tighter" feel. Discussion: [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=29055&forum=1 Is anyone running a 13/16 master cyl w/out a booster?] | ||
| + | |||
| + | * A larger master cylinder will require more leg pressure, but will require less pedal travel. Even though you press harder on the pedal, the maximum pressure at the wheels is the same. | ||
| + | |||
| + | * The size of the master cylinder does not affect front-to-rear brake proportion. Instead, the relative size of the front brakes to the rear brakes sets the proportion. | ||
| + | |||
| + | * A larger master cylinder will generate LESS pressure but the pedal will be STIFFER. Because there is less pressure, you have to push harder on the pedal to make it stop the same. You get more volume (firmer pedal), but less pressure. | ||
| + | |||
| + | The reason Datsun chose 3/4" had to do with how much leg pressure is required. At 3/4" (given the size of the brakes at the wheels), even a small driver can generate enough force to panic-stop the car. The downside is a bit of pedal travel. | ||
| + | |||
| + | Vehicles with a brake booster can have larger master cylinders, so that you get a firmer brake pedal with less travel required. But with the booster even a small driver can operate the brakes to maximum force. | ||
| = Adjustment = | = Adjustment = | ||
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| # Tighten the master cylinder retaining bolts to 1.5-1.8 kg-m (10.8 to 13.0 ft-lb) torque. | # Tighten the master cylinder retaining bolts to 1.5-1.8 kg-m (10.8 to 13.0 ft-lb) torque. | ||
| # Adjust [[Pedals|brake pedal]] height. | # Adjust [[Pedals|brake pedal]] height. | ||
| - | |||
| = Part Numbers = | = Part Numbers = | ||
| [http://www.rockauto.com/catalog/catalog.php?carcode=1208483&pgname=Brake%2FWheel+Hub http://www.rockauto.com] | [http://www.rockauto.com/catalog/catalog.php?carcode=1208483&pgname=Brake%2FWheel+Hub http://www.rockauto.com] | ||
| - | |||
| Master Cylinder (disc brakes) | Master Cylinder (disc brakes) | ||
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| * TOKICO Master Cylinder PN 46010-H1006 | * TOKICO Master Cylinder PN 46010-H1006 | ||
| * TOKICO Master Brake Cylinder (rebuild kit) PN 46010-H1027 | * TOKICO Master Brake Cylinder (rebuild kit) PN 46010-H1027 | ||
| - | |||
| TOKICO | TOKICO | ||
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| * 46010-H3300 ASSY-CYLINDER,BRAKE MASTER | * 46010-H3300 ASSY-CYLINDER,BRAKE MASTER | ||
| * 46010-H3100 ASSY-CYLINDER,BRAKE MASTER (TANDEM) | * 46010-H3100 ASSY-CYLINDER,BRAKE MASTER (TANDEM) | ||
| - | |||
| * 46020-E0300 ASSY-CAP,OIL RESERVOIR (NABCO) | * 46020-E0300 ASSY-CAP,OIL RESERVOIR (NABCO) | ||
Revision as of 18:46, 28 January 2012
Datsun 1200 used two basic brake master cylinders:
- 11/16 diameter safety split circuit, used with disc-brake models
- single reservoir, used with economy drum-brake models
Contents |
Larger Master Cylinder
Some club members are using a 13/16 master cylinder from the B310. This increases pedal effort, but reduces pedal travel for a "tighter" feel. Discussion: Is anyone running a 13/16 master cyl w/out a booster?
- A larger master cylinder will require more leg pressure, but will require less pedal travel. Even though you press harder on the pedal, the maximum pressure at the wheels is the same.
- The size of the master cylinder does not affect front-to-rear brake proportion. Instead, the relative size of the front brakes to the rear brakes sets the proportion.
- A larger master cylinder will generate LESS pressure but the pedal will be STIFFER. Because there is less pressure, you have to push harder on the pedal to make it stop the same. You get more volume (firmer pedal), but less pressure.
The reason Datsun chose 3/4" had to do with how much leg pressure is required. At 3/4" (given the size of the brakes at the wheels), even a small driver can generate enough force to panic-stop the car. The downside is a bit of pedal travel.
Vehicles with a brake booster can have larger master cylinders, so that you get a firmer brake pedal with less travel required. But with the booster even a small driver can operate the brakes to maximum force.
Adjustment
B110 has a non-adjustable master cylinder. When re-installing or after fluid has drained, do the following:
- Perform Brake Bleeding, including "bench bleeding" of the master cylinder.
- Tighten the master cylinder retaining bolts to 1.5-1.8 kg-m (10.8 to 13.0 ft-lb) torque.
- Adjust brake pedal height.
Part Numbers
Master Cylinder (disc brakes)
- WAGNER F96862 $51.79
- A1 CARDONE 111655 (remanufactured) $32.79
- TOKICO Master Cylinder PN 46010-H1006
- TOKICO Master Brake Cylinder (rebuild kit) PN 46010-H1027
TOKICO
- 46020-10611 ASSY-CAP,RESERVOIR
- 46010-H1000 ASSY-CYLINDER,BRAKE MASTER
- 46010-H1005
- 46010-H1006
- 46010-H0100 ASSY-CYL. B/MASTER TANDEM FOR DRUM
1071-
- 46010-H3300 ASSY-CYLINDER,BRAKE MASTER
- 46010-H3100 ASSY-CYLINDER,BRAKE MASTER (TANDEM)
- 46020-E0300 ASSY-CAP,OIL RESERVOIR (NABCO)
- 46020-U0512 Newer CAP
- 46020-U0201 ASSY-CAP,OIL RESERVOIR
Rebuild Kits
Note that Tokico and Nabco internals are different. So while you can interchange the whole Master, a rebuild kit needs the specific kind.
TOKICO REBUILD KIT
- PBR K7859X [for 11/16 cylinders]
- This is a major overhaul kit and supercedes all 11/16 kits.
NABCO REBUILD KIT
- ?