John Deere Funk 50000 Series Revers O Matic Transmission Service Repair Manual (4050402 & 4050514)

Table of Content (SERVICE AND PARTS ASSEMBLY MANUAL – 4050514)

Clutch Stack Assembly
Control Assembly
Control Lever Assemblies
Control Systems
Control Valve Assemblies
Converter Assembly
Converter Housing
Converter Installation Data
Description of Unit
Drive Plate Assembly
Heat Exchanger
Hydraulic Flow Diagram
Model Identification
Oil Filter
Oil Lines
Operation Procedure
Part Kits
Performance Check
Revers-O-Matic
Service Procedure
Specification and Application Data
Typical Model Cross Section Drawing
3 Speed Transmission Parts List
4 Speed Transmission Parts List

The Revers-O-Matic Drive consists of a pair of hydraulically actuated multiple disc clutches. When the front clutch is engaged, the output shaft turns engine-wise and in most applications this produces forward motion. The rear clutch is driven by a simple gear train, and its rotation is opposite to the front clutch. Therefore, when the rear clutch is engaged, the output shaft turns anti-engine wise and in most applications this produces rearward motion.

The power is transmitted from the engine to the Revers-O-Matic Drive through a torque converter. The use of a torque converter, has two distinct advantages. First, the converter is essentially a fluid drive, there being no direct mechanical connection through it. This feature creates a very smooth and shock-free drive with the elimination of engine stalling and lugging. Secondly, the converter multiplies torque, but only during heavy pull-down loads. When loads are light, the converter transmits the engine power directly at almost engine speed and there is no torque multiplication. The net result is an action like a transmission, with infinitely variable and automatic speed ratios. The need for shifting gears, although present, is greatly reduced.

The Revers-O-Matic Drive is controlled by (1) one of (4) four control systems.

The standard control (40RC7824) is a very unique system, thus being a device that sorts out motions from a single hand lever that FIRST engages one of the clutches and then accelerates the engine as the lever is moved further. Therefore, it is a unified control that regulates both the direction of travel and the speed of travel. Movement of the lever from a neutral position in one direction produces forward motion, and opposite movement of the lever produces rearward motion.

The optional 40RC7818 control is basically the same type as the 40RC7824 standard control, except that it is actuated by foot pedals instead of a hand lever. The action of the foot pedal is essentially the same, except that one pedal produces forward motion and the other, rearward motion.

The optional control system (40RC7812) is designed to accommodate the system requiring a self centering control valve, it also features the synchronized characteristic of engaging the clutches before accelerating the engine.

The optional control system (40RC7804) is designed to accommodate the system requiring a 3 pos. valve and a separate accelerator device. CAUTION:

The clutches are not power absorbing members and must not be subjected to slippage under power.

The clutch must be engaged prior to accelerating the engine when the vehicle is to be moved or direction changed.

The clutches are hydraulically applied and spring released. Each clutch has six friction plates which have sintered bronze facings and six reaction plates of polished steel. Because the clutches are hydraulically control¬ led, there is automatic compensation for normal wear – no adjustment is necessary.