Left-hand-drive (LHD) versions of the Datsun 1200 used a hydraulic clutch system. It is very nice, with a light, linear action.

Daily Care

1972 USA Owners manual (Page 25 ... ):

[[1972#toc|]]

Before driving or whenever you call at a gas-station, be sure to check ...

Leakage and amount of fluid in brake and clutch master cylinders

Clutch and brake operation

Observe the level of fluid visible through the plastic reservoir of the master cylinder (no need to remove the cap).

If it is at or below the fill line, top up with DOT 3 Brake/Clutch fluid.

Overview

Stock pedal force is 10.8 kg (23.8 lb), a bit higher than the RHD mechnical clutch at 8.3 kg (18.3 lb). The slave cylinder diameter is 3/4 inch and the master cylinder is 5/8 inch.

Extremely light clutch pedal effort, but with good feedback

1987 Nissan 1200 truck

Post 489658

Album 537

Clutch slave cylinder bolted to transmission

Album 25468

Adjustment

This is for the 71-73 1200. The B210 (120Y) measurements are different.

Adjust slave cylinder free play

Adjust pedal pad height without stopper

Adjust pedal stopper

Clutch Slave Cylinder

Stock clutch slave cylinder diameter is 3/4 inch.

Adjust the free play to 5/32" (1 to 2 mm play). Pull the release lever towards the rear of the car as far as you can, then let go, and see how far it goes forward. That's the play. To adjust, loosen the locknut (the two nuts), then turn the shaft in or out.

Album 539

Pedal Linkage

IMPORTANT: Before adjusting the pedal linkage, first adjust the clutch release arm under the car (see section above).

Album 538

The pedal specs are:

Pedal height: 5.57 in (141.5 mm)

Pedal free play: 1.181 in (30 mm)

Pedal stroke is 5.65 in (143.5 mm) with the adjustment stop (the switch in the diagram) backed off. Adjustment is made with shims for the cylinder on the firewall.

https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/trans/CL-06_CL15.jpg

Adusting Shim

30611-27260 1.6 mm

30612-27260 0.8 mm

30613-27260 0.5 mm

Removable, Replacement and Bleeding

A common problem with clutch not working is the clutch master cylinder leaking internally. So no fluid leaks out, yet it won't fully activate the slave. To test if that's the problem, take the cap off the master, and watch while you pump the clutch pedal. If the fluid level RISES as the pedal goes down, the first piston seal is leaking. In extreme cases a jet of fluid will shoot up.

If the master is bad, replace it. Or a kit (new seals) can be installed.

Bleeding

Master Cylinder

If the Master Cylinder runs dry, or when replacing it, be sure to bleed the Master Cylinder. separately. Remove the outlet pipe & place a thumb over it for the return stroke of the cylinder (to prevent ingestion of air). Push the cylinder rod once or thrice. Once the Master Cylinder is free of air you can bleed the whole system with confidence.

Slave Bleeding can be done by one person (no assistant needed):

Put about 1" new fluid in a clear glass. Place glass on ground. The fluid prevents air from going back up into the cylinder

put a hose from the slave bleeder to the bottom of the glass, making sure the new fluid covers end of hose

Crack the bleeder slightly

pump the pedal while you watch the glass (lie on the ground with the door open, and work the pedal with your hand). When air bubbles stop coming out, it's done. Often this only takes two or three pumps.

tighten bleeder

top-up the master cylinder. DO NOT REUSE BRAKE FLUID

Any spilled brake fluid should be rinsed off painted surfaces with lots of water.

Part Numbers

Stock USA cylinders. "Repair Kits" are also available. These include all new rubber parts, and can be used if the aluminum body is not pitted. The bore is hand-honed. Often with aluminum a kit will leak, so we recommend a new unit rather than a kit. Cast-iron cylinders may have better success.

Master Cylinder

Clutch Master Cylinder - 5/8"

30610-24900 ASSY-CYLINDER CLUTCH MASTER (5/8" NABCO)

http://www.rockauto.com

30610-24900 (superceded by 30610-24910). $111 USD

RHINO PAC M0600 $35.79

Slave Cylinder

Clutch Slave Cylinder - 3/4"

30620-H1600 ASSY-CYLINDER CLUTCH OPERATING Album 4652
Left: Original Style 30620-H1601 (superceded by 30620-H1600) $59 USD
Right: Replacement Style 30620-H1600

Clutch Slave Cylinder Rockauto * RAYBESTOS SC37495 $12.44 * ACDELCO 18F19 $14.56 * RHINO PAC S0600 $15.92 * EXEDY SC558 $6.84 * KELSEY-HAYES S51000 $4.83 * NAPA/UNITED 37495 $14.72 * BRUTE POWER/PERFECTION CLUTCH 37495 $6.44 * RAYBESTOS SC37495 $4.71

Exedy

Album 27025

B310 A14 (60-series gearbox)

Album 25417

B210

Master

* Clutch Master Cylinder: 5/8 inch HB210 USA 30610-H2502/30610-B8000/30610-B8001 30610-H5801/30610-H5802 4> 30610-B8001

Album 19294 * Comparo: B110 and B210 are both 5/8" Master Cylinders * NOT interchangeable with B110 due to the rod differences * B310 looks the same as B210 except bolts are at 45 degrees

Beck Arnley part number 072-6489 * 620 Pickup from 1972-3/76 * B210 (all models) from 1974-4/75 * SPL-311 (1600 or 2000) from 1966-70 * 510 from 1968-73 (with Nabco master cylinder) * 610 from 1973-75 (with Nabco master cylinder) * 710 from 1973-75

Beck Arnley part 072-6521 * 74-75 B210 * 76 F10 * 72-76 * 620 pickup * 66-70 SPL-311 1600 * 68-70 SPL-311 2000 * 75-78 280Z * 69-73 510 * 78-81 510 * 73-76 610 * 74-77 710 * 77-81 810

Slave

HB210 USA 11/16" - 4speed ALL, 5speed from 11/76 * 30620-H6100 Clutch Slave Cylinder <> 30620-H6101/30620-H61012 early 5-speed 3/4" - to 9/76 * 30620-U7000 Clutch Slave Cylinder: 11/16 inch <> 30620-R6400

610 30620-S0100 Clutch Operating Cylinder [slave cylinder, 3/4"] * For 63-series 4 or 5-speed Alternatives: * 30620-18V00, 30620-18V01, 30620-69F03, 30620-69F70, 30620-P9500 * 30620-S0100, 30620-U7000, 30620-U7001, 30620-W7000, 30620W-W7001 30620-18V01 * S13 240SX 1991-1993 30620-69F03 * S14 240SX 1996- 30620-P9500 * S130 280ZX 1982-

HYDRAULIC HOSE

The hose is difficult to find in USA, except on eBay. Alternatives: lot of the brake hoses from cars with a solid rear axle will work also.

(rear brake hose) * BRAKEWARE #77001 $12 at Autozone.

It's about 1.5-2 inches longer then the original, does not hang too low and bolts right up

1200 rear brake hose $4 at RockAuto * one male, one female end * Wagner BH96544 * Bendix 77101 * American Remanufacturers 8704300 * Coni-seal BH177101 * Dorman H36866 (13") * Raybestos BH36866/4536866/SP5939 (13-3/16") * Centric 15042300 * Guardian 3196544 * Beck/Arnley 073-0879 ( 0730879)

Bendix 77101 * 46201-89918 * 46201-H7200 * 46211-89911 Length: 13-3/64" 10x1.0 mm female x 10x1.0 male

Album 25419 Album 25467