A6VM hydraulic motor for Volvo 11308278 14566750 11308276 2806512 2814561 2814564 43662420 wheel loader and excavator

Volvo wheel loaders (e.g., L60F, L70G, L90H, L110H, L120, L150, L180, L220) utilize a hydrostatic-mechanical split-drive transmission. The rear axle is typically driven by a hydraulic motor. The Rexroth A6VM series, particularly the A6VM107, A6VM160, A6VM200, and A6VM250 displacement variants, perfectly match Volvo’s SAE 2-bolt and 4-bolt mounting flanges.

Control Adaptation for Volvo’s Load Sensing System

Volvo loaders use a load-sensing (LS) network. The A6VM must be configured with the correct HD (Hydraulic shut-off with high-pressure relief) or DA (Dynamic anti-stall) control. The DA control is particularly useful for wheel loaders: it automatically adjusts motor displacement based on engine speed and system pressure. When the loader hits a hard bank, the DA control downshifts the motor (reduces displacement) to increase wheel speed and breakout force.

Common Failure Modes and Retrofit Solutions

1. Speed Sensor Faults (P0725 Code)

Volvo’s CAN bus system relies on a magnetic pickup. The A6VM housing includes a M16x1.5 speed sensor port. Use the OEM Volvo sensor (P/N: 11712665) or a Bosch Rexroth adapter kit. Human tip: Always set the air gap to 0.8–1.2mm; too close damages the sensor face.

2. Shaft Seal Leaks at the Brake Mounting Surface

The A6VM uses a FPM (Viton) high-pressure shaft seal rated to 10 bar continuous case pressure. Volvo’s park brake is a wet-disc, mounted directly to the motor shaft. A worn seal allows hydraulic oil into the brake housing, causing brake slip. Replace the seal with a Rexroth seal kit (Part No. R910995385) for high-heat applications.

3. Low-Speed Cogging

At creep speeds (0–3 km/h), some A6VM motors exhibit uneven rotation. Solution: Verify the minimum displacement stop is set to at least 15% of max displacement. Set to zero causes the motor to attempt maximum torque at near-zero flow, leading to pressure spikes.

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Q1: What is the primary function of the A6VM hydraulic motor in a Volvo machine?

A1: Its primary function is to convert hydraulic power (high-pressure oil flow) into continuous rotary mechanical motion. This motion drives the wheels of wheel loaders and the tracks of excavators, enabling the machine to move.

Q2: Does the A6VM support the Volvo “Brake Saver” function (retarding)?

A2: Yes. In overrun conditions (e.g., descending a ramp with a full bucket), the A6VM acts as a pump. The DA control automatically increases displacement to generate braking torque, sending oil back through the main cooler.

Q3:What is the price and delivery time of the Volvo hydraulic motor?

A3:The specific price and delivery time will be provided based on the specific model you provide.

Q4:How to purchase an A6vm hydraulic motor?

A4:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.