Internal Features Model 6; Performance Data; Dimensions - Rayco RG25HD Operator, Service, Maintenance, Parts Manual

RG25DH Operation • Service • Maintenance • Parts Manual
Troubleshooting
Light Duty Hydrostatic

Internal Features Model 6

Cam Ring
(for Varying Pump Displacement
and Direction of Flow)
Wide Band
Neutral Optional
Light Duty Hydrostatic

Performance Data

Flow Diagram
Models 6 and 7
Model 6 and 7
This diagram shows flow of fluid through an
Displacement (Theoretical)
internal closed loop between the pump and
Pump (Variable) ............... 0 - 7,6 cm
the motor. The flow is directed by the pump
Motor (Fixed) ............................ 12,6 cm
to the motor and then back to the pump.
Speed
Because of leakage, the amount of fluid driven
Input (Maximum) ........................................ 3600 RPM
back by the motor is slightly less than that
Output .................................................... 0 – 2150 RPM
required by the pump. Check valves on the
Kw/Horsepower, Input (Max.)
inlet side of the pump are open to the
@ 3600 RPM .............................................. 3 Kw [4 HP]
reservoir enabling the pump to draw fluid as
Torque, Output
needed.
Continuous ....................................... 14 Nm [120 lb-in]
Intermittent ...................................... 20 Nm [180 lb-in]
Speed control is achieved by changing the
Peak ................................................. 27 Nm [240 lb-in]
amount of oil delivered by the variable
Operating Temperature (Max. Cont.) ....... 82° C [180° F]
displacement pump to the fixed displacement
motor by moving the control lever.

Dimensions

Model 6 and 7
110,2/106,7 [4.34/4.20].
89,2/87,1 [3.51/3.43]
119,9 [4.72]
(2 Places)
79,5 [3.13]
Max.
1/4-20 UNC
Thread x 12,7
[.50 ] Deep
46 OIL LEVEL COLD
Input Rotation
Optional
Reservoir
Ball Piston
Hydraulic Pump
(Variable Displacement)
Input
Shaft
Dump
Valve
Control
Shaft
Cam Ring
Output Torque
(for varying pump displacement)
Nm [lb-in]
Ball Piston
27 [240]
Pump
Variable
24 [210]
Displ.
3 3
/r [0 - .465 in /r]
3 3
/r [.767 in /r]
20 [180]
17 [150]
14 [120]
10 [90]
High Pressre Oil
Low Pressure Oil Return
Intermittent Use Only
154,9
[6.10]
18,56/18,31
Output Torque vs. Output Speed
N
F R
Control Lever
(Customer
Supplied)
Check Valves
7 [60]
3 [30]
0 400
66,70/64,90
[2.625/2.555]
1/8 x 1/2
Woodruff
Key (#3)
Provided by
Customer
Ball Piston
Hydraulic
Motor
(Fixed Displacement)
Pintle
Input Speed — 3600 RPM
Temperature — 77°- 82° C [170°- 180° F]
800 1200 1600
Dump Valve (holds check
valves open for free wheeling)
Output — RPM
70,0[2.76] Dia. Max.
48,3 [1.90]
15,87 [.625]
Mounting Surface
Bleed/Drain (2)
Straight Thread – 6 Port
O-ring Boss (for 3/8 inch
nominal tubing OD)
per SAE -J514 Spec.
1/8 x 1/2 Woodruff Key (#3)
Provided by Customer
69,82/69,77
[2.749/2.747]
Output
Shaft
Ball Piston
Motor
Fixed
Displacement
2000
5