81.35199.6554 Middle Reducer Bevel Gear Set

The 81.35199.6554 F3000 Middle Reducer Bevel Gear Set is a key transmission part for Shaanxi Heavy Duty Truck F3000 heavy-duty trucks' middle reducer. It changes power direction, reduces speed, and increases torque, sending power from the transmission to the drive axle-this keeps the truck stable when carrying heavy loads (≤50 tons) or on complex roads, and is vital for the driving system.

We use good materials and precision tech to make it: the gear blank is 20CrMnTi alloy steel (strong and impact-resistant), with carburizing and quenching-surface hardness HRC 58-62, core hardness HRC 30-35. The tooth surface is precision ground, with Class 6 accuracy and Ra 0.8μm roughness, reducing meshing friction. Its installation dimensions (shaft hole, keyway, meshing clearance) match the original F3000 middle reducer. Replacement is easy: take apart the reducer housing, remove the old gear set, install the new one (align positioning pin and meshing position), adjust clearance to 0.15-0.25mm-no need to modify the housing or shaft. Before shipping, we test strictly: hardness test, noise test (≤75dB), 500-hour load test-quality is reliable.

Stable power transfer: Precision bevel gears mesh smoothly, changing direction and adjusting torque-no power loss, no start/climb jitter.

Wear-resistant & tough: Alloy steel resists deformation; carburized surface (HRC 58-62) reduces wear. Resists shakes/temps, passed tests, lasts long.

Fits F3000 fast: Matches original reducer mounts and meshing parameters. Aligns perfectly, easy install, saves time.

Low noise: Optimized teeth reduce impact-no abnormal noise, better comfort.

Only SHACMAN F3000 (middle reducer). No other SHACMAN models (X3000) or brands (HOWO)-different reducer/gear specs, can't fit.

Product Model: 81.35199.6554

Fits vehicles: SHACMAN F3000 trucks

Function: Changes power direction, reduces speed, and increases torque for the middle reducer

Gear type: Bevel gear set (matches F3000 reducer ratio)

Material: Gear body (alloy steel); surface (carburized hardening)

Installation: Direct replacement-fits original F3000 reducer mounts/meshing

Working conditions: -30℃ to 100℃; resists heavy load, gear friction, road shakes

Surface hardness: HRC 58-62

Q1: Works on Shaanxi X3000?

A1: No-X3000 has different reducer and gear parameters. Using it causes abnormal meshing and tooth wear, so get X3000's special gear set.

Q2: Abnormal noise after install?

A2: First check meshing clearance (0.15-0.25mm). If normal, check installation (positioning pin, meshing mark). Then check reducer bearing wear. Still noisy? Replace the gear set (rare for new ones).

Q3: How to maintain?

A3: 1. Change gear oil every 30k km (use API GL-5 85W-90); 2. Check oil level every 5k km-avoid insufficient oil; 3. Don't overload (≤50 tons) to reduce gear stress.

Q4: Need to replace the reducer bearing with a new gear set?

A4: Yes, definitely. Old bearings have wear-if not replaced, they cause gear axis shake, affect meshing accuracy, and shorten the new gear set's life.

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