Brake Wheel Cylinder 47570-36210 4757036210 For TOYOTA Coaster HZB50 RZB40 Dyna 200 BU102 Toyoace 1HZ 15B-FTE — OEM Verified Direct Fit, 28.57mm (1-1/8") Bore, Rear Left Forward (LH, Front Or Upper)

The Brake Wheel Cylinder with OEM numbers 47570-36210 / 4757036210 is a verified direct-fit replacement for TOYOTA Coaster buses and Dyna 200 / Toyoace light trucks. This wheel cylinder is a critical hydraulic component of the rear drum brake system, responsible for converting hydraulic pressure from the master cylinder into mechanical force that pushes the brake shoes against the drum to slow or stop the vehicle.

This cylinder is specifically the rear left forward (LH, Front or Upper) position unit, designed for Coaster HZB50 (1993–1999/2003) and related HZB/RZB/TRB/XZB/BZB/BB series chassis, as well as Dyna 200 BU102/BU112/BU140/BU141 and Toyoace applications from the mid-1990s through the early 2000s. It features a cast iron body with a 28.57 mm (1-1/8 inch) bore and is supplied with a bleeder screw in standard aftermarket configuration.

• Bore Diameter Verified: 28.57 mm (1-1/8 in) — confirmed by multiple supplier listings ("1-1/8"" and "buraco 28.57mm"). TecAlliance ADVICS data lists drill hole diameter as 28.5 mm, consistent with nominal 1-1/8" classification.
• Position Verified: Rear Left Forward (LH, Front or Upper) — Toyota EPC catalog code confirms "FOR LH, FRONT OR UPPER"; Russian catalog confirms "R.LH.F" (Rear Left Forward) for Dyna 200; TecAlliance confirms "左リアアクスル" (left rear axle).
• Material Verified: Cast Iron — confirmed by TecAlliance ("素材: 鋳鉄") and Portuguese supplier ("material: Cast Iron").
• Thread Specification Verified: 1 × M10×1.0 — confirmed by TecAlliance ADVICS data.
• Weight Verified: 1.283 kg (NAP reference) / 1.475 kg (Axcel/BGF/SAM reference) — weight varies by brand and whether the unit includes the bleeder screw and packaging.
• Bleeder Screw: Included — BGF product title explicitly states "W/ BLEEDER" for the 47570-36210 application.
• Vehicle Coverage Verified: Confirmed for Coaster (TRB5#, XZB5#, RZB4#, HZB5#, BZB5#, BB4#) 93–03, Dyna 200/300 BU100, 200 series 95–02, with engines 14B/1H-Z 3.7L/4.2L and 15B-FT/15B-FTE 4.1L.
• OEM Cross-Reference Verified: Replaces 47570-36210, 4757036210. Aftermarket cross-references include AISIN WCT-045 / ADVICS WCT-045, Blue Print ADT34469, BGF BWN731 / F026A02347, AW1254, JAPKO 67235, Seiken, Yamasida, NAP, Axcel, SAM, SANYCO.

• Brake fluid leak at the wheel: Visible wetness around the backing plate or inside the brake drum — indicates seal failure and imminent braking loss.
• Spongy or long-travel brake pedal: Pedal sinks further than normal and feels soft — air enters the system through a failed seal, reducing hydraulic pressure.
• Uneven braking or vehicle pull: Vehicle pulls to one side during braking — one wheel cylinder is not applying equal force, causing imbalance.
• Brake fade or overheating drums: Extended stopping distances and hot brake drums — a failing cylinder may cause dragging or insufficient shoe application.
• Brake warning light illumination: Dashboard brake warning activates, often accompanied by abnormal brake behavior — inspect wheel cylinder immediately.

Confirmed Fitment Sources: BGF explicitly lists 47570-36210 for TOYOTA DYNA/DYNA-200/DYNA-300 BU100,200 SERIES 15B-FT/15B-FTE 4.1L 95–02 and COASTER BUS (TRB5#, XZB5#, RZB4#, HZB5#, BZB5#, BB4#) 14B/1H-Z 3.7L 4.2L 93–03. Toyota EPC catalog confirms the part code as "CYLINDER ASSY, REAR WHEEL BRAKE (FOR LH, FRONT OR UPPER)" for the Coaster/Dyna platform. PartSouq lists the part under TOYOTA XZU404 HZB50 application.

• Position is the primary selection risk: This is the rear left forward (LH, Front or Upper) cylinder. The rearward (lower) position on the same side may use a different OEM number. Do not interchange forward and rearward cylinders — confirm the required position against the original unit.
• 47570 vs. 47550: 47570-36210 is the LH forward cylinder. The RH forward counterpart is 47550-36210 (covered in the previous listing). These are mirror-image components and are not interchangeable left-to-right.
• Bleeder screw: BGF confirms this unit is supplied with bleeder screw. Confirm at inquiry if your application requires a specific bleeder arrangement.
• Coaster vs. Dyna/Toyoace: The same part number serves both bus and light-truck applications on related platforms. Confirm the chassis code and brake configuration before ordering, especially for Coaster variants with different rear axle designs.

1. Confirm position first: Verify that the replacement is the rear left forward (LH, Front or Upper) cylinder, not the rearward counterpart. Compare the OEM number and physical orientation to the original unit.
2. Safety first: Park on level ground, engage parking brake, and chock front wheels. Wear safety glasses and gloves.
3. Remove wheel and drum: Loosen lug nuts, raise the vehicle, remove the wheel, and extract the brake drum. Inspect drum and shoes for wear.
4. Disconnect hydraulic line: Place a drain pan underneath, disconnect the brake line from the wheel cylinder, and plug the line immediately to prevent contamination.
5. Remove old cylinder: Unbolt the wheel cylinder from the backing plate. Note the orientation of the push rods and the forward/rearward position for correct reassembly.
6. Clean mounting surface: Remove rust, dirt, and debris from the backing plate mounting area. Inspect the backing plate for damage or deformation.
7. Install new cylinder: Position the new wheel cylinder (47570-36210) onto the backing plate and tighten mounting bolts to specification.
8. Reconnect brake line: Connect the hydraulic line. Tighten to M10 × 1.0 thread specification without over-torquing.
9. Install shoes and drum: Reinstall brake shoes, adjuster components, and drum. Set shoe-to-drum clearance to the workshop manual specification.
10. Bleed the brake system: Fill the master cylinder reservoir with DOT 3 or DOT 4 brake fluid. Bleed until clear, bubble-free fluid flows from the bleeder screw. This unit is supplied with a bleeder screw — confirm function before starting the bleed procedure.
11. Test brakes: Pump the pedal to seat the shoes, check for leaks, and road-test at low speed before returning the vehicle to service.

• Inspect wheel cylinders at every 40,000–50,000 km or during any brake service.
• Replace wheel cylinders in axle pairs or position-matched pairs — mixing old and new cylinders on the same axle can cause uneven braking.
• Flush brake fluid every 2 years or according to manufacturer interval — contaminated fluid accelerates seal degradation.
• Inspect the backing plate for brake fluid wetness at every oil change — early detection prevents catastrophic seal failure.

• Standard packing: Individual box with protective packaging; wooden pallet available for bulk export orders.
• Package contents: 1 × Brake Wheel Cylinder (installation hardware not included; bleeder screw included per BGF specification).
• Set options: Single cylinder / forward pair (LH + RH forward: 47570-36210 + 47550-36210) or full rear set (4 positions) — specify at inquiry.
• Suitable for: TOYOTA Coaster / Dyna / Toyoace brake system repair shops, bus fleet maintenance departments, spare parts distributors, and export wholesalers serving Southeast Asia, the Middle East, Africa, and Latin America.
• Related parts available: Paired counterparts 47550-36210 (RH forward), 47560-36210 (LH forward, where applicable), 47580-36210 (LH rearward); brake shoes, brake drums, wheel cylinder repair kits (e.g., Yamasida 4757036210K / Seiken SK45061R2), and brake fluid (DOT 3/DOT 4) for the Coaster/Dyna platform.