Rexroth A2FM A10FM fixed displacement motor for the Dynapac Engineering Equipment 378166 390605 4700380078 4700390605 4700391330 4749260420

On a Dynapac roller, fixed motors usually do three jobs:

1. Travel drive: powering the drum or wheels, often through a planetary gearbox.

2. Vibration drive: spinning the eccentric weights inside the drum.

3. Auxiliary drives: cooling fans, steering pumps, and similar loads on some machines.

Rexroth A2FM: The Bent-Axis Workhorse

Design and key specifications

The A2FM is a bent-axis, axial piston fixed motor. It's described as an all-purpose high-pressure motor, offered in sizes 5 to 1000, with nominal pressure up to 400 bar, maximum pressure up to 450 bar, and use in both open and closed circuits.

In the 6x series, individual sizes carry solid numbers. A widely listed 63 cm³ unit is rated for 5000 rpm continuous and 5500 rpm intermittent, with a maximum housing pressure of 10 bar absolute and a 4-hole ISO 3019-2 mounting flange. Those limits are worth checking against your circuit before you approve a substitute.

Rexroth A10FM: The Compact Swashplate Motor

How it differs from the A2FM

The A10FM is a swashplate-design motor, not a bent-axis one. Series 52 covers sizes 10 to 63, with a nominal pressure of 280 bar and a maximum of 350 bar, for open and closed circuits. Its listed features include high permissible output speed, low noise, a compact plug-in version and an optional integrated anti-cavitation valve for uses such as fan drives.

Application guidance for the A10FM points toward compact drives such as fan drives, winches and auxiliary equipment.

A2FM vs A10FM at a Glance

The pressure and size figures come from the datasheet material cited above. The role row reflects typical use, not a fixed rule.

Installation and Maintenance Tips from the Field

1. Fill the case before start-up. A dry-started axial piston motor can damage its bearings and rotary group in seconds.

2. Watch cleanliness. Contamination is the most common cause of premature wear. As a rough floor, target ISO 4406 codes around 20/18/15 or cleaner, and check the datasheet for the exact requirement.

3. Respect case pressure. The 10 bar absolute housing limit on some A2FM sizes is not a suggestion. Blocked drain lines and undersized fittings cause seal failures.

4. Check the temperature. Sustained oil temperatures above the recommended range cook seals and thin the oil film.

5. Flush the system after a failure. Metal debris from a failed motor will kill the new one if you skip this.

For more brand and equipment models, please visit https://www.baolilaihydraulic.com/brand/

Q1: How do I identify the correct motor for my Dynapac machine?

A1: Start with the motor nameplate. Then match it against the Dynapac parts documentation using the machine's serial number, and confirm with an authorized dealer.

Q2: Should I repair or replace a worn motor?

A2: It depends on the damage. Light wear on a large motor may justify a rebuild by a qualified shop. Scored shafts, cracked housings or heavy contamination usually favor replacement, and either way the root cause must be fixed first.

Q3:What is the price and delivery time of the Rexroth A2FM/A10FM motor for the Dynapac Engineering Equipment?

A3: The specific price and delivery time will depend on the equipment model or specific product model you provide.

Q4: How to purchase a Rexroth A2FM/A10FM motor for the Dynapac Engineering Equipment?

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