Ronny Industries Limited

KYB Mixer Drive -

Drive Unit for Concrete Mixer Truck

KAYABA's best hydraulic driving system of the leading mixer truck manufacturer in Japan

Applicable model Specifications
Reduction Gear Specifications
Hydraulic Pump Specifications
Hydraulic Motor Specifications
Hydraulic Pump
Hydraulic Motor
Reduction Gear
Structure of Drum Shell
Drum Speed-Engine Speed
Hydraulic Circuit

Application Model

Gear Model	RF-100	RC-100
Drum Volume (m³)	16	10 ~ 13	9 ~ 9.5
Max loading volume (m³)	9 ~ 10	8	6

Reduction Gear

Model	RF-100	RC-100
Type	Flat 2-Step + Planet 1-Step
Reduction ratio	1 / 135.59	1 / 127.78
Max. output torque (KN.m)	61.8	35.3
Output shaft swing angle (degree)	± 4	± 3
Drum flange PCD (mm)	500	300
Drum fitting angle range (degree)	13 ~ 14	16 ~ 18
Lubricant q'ty (liter)	12	10.5
Mass (kg)	310	185
Total length (mm)	525	527
Total width (mm)	719	612
Total height (mm)	545	439

Hydraulic Pump A: Anti-clockwise rotation ; C: Clockwise rotation

Model	PSVS90A / PSVS90C
Type	Swash plate
Displacement (cm³/rev)	0 ~ 90.3
Charge pump capacity (cm³/rev)	24
Input shaft normal rotation speed (rpm)	420 ~ 2,600
Input shaft max. rotation speed (rpm)	3,000
Input shaft min. rotation speed (rpm)	340
Mass (kg)	50
Max. working pressure (Mpa)	34.3
Total length (mm)	298.9
Total width (mm)	254.4
Total height (mm)	242.5

Hydraulic Motor

Model	MSF85
Type	Swash plate
Displacement (cm³/rev)	87.3
Output shaft normal rotation speed (rpm)	2,700
Max. output torque (N.m)	476.9
Mass (kg)	23
Max. working pressure (Mpa)	34.3
Total length (mm)	282
Total width (mm)	197
Total height (mm)	184

Note: The rotational direction of hydraulic pump is viewed from the output shaft side.

Hydraulic Pump	Hydraulic Motor

Constant drum rotation through control mechanism. (Constant speed method) Reduced operation power. Mounted cam plate with detent function. SAE port flange provided. Lightweight and compact.	Superior stability at low speed. SAE port flange provided. Lightweight and compact.
Reduction Gear

RC100/RE100	RF100
Compact and Lightweight Reliable durability, High efficiency and Low noise

Structure of Drum Shell

Seal pipe A ensures effective loading with its large-diameter and funnel shape.
Mixing blade C and Mixing Hole D maintains the quality of ready-mixed concrete, with its high mixing performance.
Drum Shell E and all Blades are of high-tensile steel with excellent durability and performance characteristic.
Blade B improves low-slump discharge performance and prevents mortar sticking with its curved and perforated blade.

Drum Speed-Engine Speed

Hydraulic Circuit