Subaru Robin Power Products EX27 Rammer Engine, Designed Specifically For Rammers, Benefits

RAMMER

Light weight, yet durable and packed with power.

Designed specifically for rammer applications, these engines feature overhead valve (OHV) upright cylinder technology to provide continuous rated power for demanding rammer applications. Rammer engines are easy starting and lightweight, yet built for high power, high stress and high performance.

DESIGNED SPECIFICALLY FOR RAMMERS

BENEFITS

Ideally balanced, the engine’s upright cylinder reduces swinging movement and vibration, resulting in less operator fatigue. The cylinder’s vibratory force moves in the same direction as the rammer itself increasing momentum.

•Electronic ignition with automatic timing adjustment for easier starting.

•Lightweight design increases mobility.

•Vibration-proof breather mechanism maintains separation between oil and breather air enabling any position operation and transportation without concern for contamination.

#1 - Aluminum alloy block with cast-iron cylinder liners for durability.

REINFORCED POWER

Built with a vibration-proof breather mechanism, thick sheet metal,

and reinforced casting parts with thick walls and ribs, rammer engines are durable to withstand demanding environments.

•Reinforced casting parts are strong enough to endure the toughest conditions.

•Heavy-duty casing with cross bracing ensures durability in demanding rammer applications.

KEY FEATURES

1 Cast-iron cylinder liners

#2 - Dual ball bearing crankshaft support provides reliable performance even in demanding rammer applications.

RAMMER ENGINE

Rammers present a special engineering challenge. The engine must withstand both the vibration of the compactive force and the high dirt and dust environment. Additionally, rammer engines require a high degree of specialized design to integrate with the rest of the machine for maximum performance. The rammer designs require that the entire machine be balanced on the center of the foot in both the front to back axis and side to side axis. Since the engine is mounted to the side of the leg of the rammer, the lesser the width (W) of the engine the less the rammer needs to be angled (A) forward to balance the machine over the foot. As the rammer angle (A) is increased, the compaction force (F1) that impacts the ground is reduced and the backward force (F2) increases – propelling the rammer forward and reducing compactive force. To maximize the compaction force, Subaru rammer engines are designed specifically for rammer applications. All Subaru rammer engines are balanced close to the mounting face and also are balanced on the side to side axis for best compaction performance and easy operation.

2 Dual ball bearing crankshaft support

3 Vertical cylinder design

W

4 Specific rammer designA

F2

F1

#3 - Vertical cylinder design maintains an excellent center of gravity to efficiently transmit power to the ground, ensuring performance second to none.

#4 - Specific rammer design ensures exceptional and reliable performance in a durable, sustaining package.