4-5GEARCASECOVER

Gearcase cover is made of aluminum alloy die casting and is fittedonthe reverse side ofthe flywheel. This coverem- braces the injection pump, timing gear, operating lever and supports the camshaft as a bearing. To the gear case cover the tappetguide is fitted and then the tappetsare assembled, (See Fig. 5.)

Fig. 5

4-6 CAMSHAFT

The camshaftis made of forged chrome steel wholly sintered and then ground. It carries three cams, viz. one intake cam, one exhaust cam, and one fuel injection pump cam, and the shaft is supportedbya ball bearingpressure-fitted in the

i

gear case cover and by the gear case. The camshaft is assem bled inside the gear case cover. To the shaft therelief valve and a pin are fitted. The pin is used when starting engine by hand cranking. (See Fig. 6.)

4-7TAPPET and TAPPET GUIDE

4 - 7- 1 TAPPET

Tappet is made of forged steel and wholly sintered, ground,

andthentaftridefinished.Thecamshaft has oil holesfor lubricating tappets.

4-7-2TAPPET GUIDE

Tappet guide is made of aluminum alloy die casting and de- termines tappet positionsandis fitted to the gear case cover. In the crankcase there is a blow-bygas hole, which hole goes through up till rocker chamber via push rod sleeve.

(See Fig. 6.)

4-8ROCKER ARM

Fig. 6

Rocker arm is made of forged steel and is wholly sintered and then ground, and itis supported by the rocker shaft. At the one end it has valve clearance adjusting screw. With this screw valve clearance is adjusted to the specified gap and is fixed by lock nut. Lubrication of the rocker arm is carried out by theoil splash contained in the blow-by gas from the crankcase. In- take rocker arm has decompression mechanism.(See Fig. 6 . )

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Subaru Robin Power Products DY41, DY35, DY30 manual 8ROCKER ARM, Tappet
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DY41, DY30, DY35 specifications

Subaru Robin Power Products have built a solid reputation in the realm of portable engines and generators, particularly with their DY35, DY30, and DY41 models. These engines are extensively used for various applications, ranging from construction to agricultural equipment, owing to their reliability and efficiency.

The Subaru DY35 engine exemplifies performance with a displacement of 35cc. Its lightweight design ensures easy portability, while its robust construction provides durability in demanding environments. Featuring a two-stroke cycle, the DY35 offers a high power-to-weight ratio, making it ideal for handheld equipment and compact machinery. Key characteristics include its advanced electronic ignition system that promotes easy starting and reliable operation. The DY35 also boasts superior fuel efficiency, which translates to lower operational costs over time.

Moving on to the DY30, this engine is designed with versatility in mind. It has a slightly smaller displacement of 30cc, making it a great choice for various power tools and smaller machinery. The DY30 is known for its excellent torque delivery, which allows users to tackle challenging tasks without the need for frequent refueling. One of its standout features is the automatic lubrication system that keeps the engine running smoothly while minimizing wear and tear. This feature significantly extends the engine’s life, making it a favorite among users looking for long-term performance.

The DY41 takes a step up in power with a displacement of 41cc, making it suitable for heavier-duty applications. Designed for larger equipment, the DY41 is renowned for its high torque and robust construction. It also includes an innovative cooling system that effectively dissipates heat, ensuring optimal engine performance in prolonged usage scenarios. The DY41 is equipped with advanced vibration-dampening technology, which enhances user comfort and reduces fatigue during operation.

Each of these Subaru Robin engines incorporates fuel-efficient technologies that reduce emissions and comply with environmental regulations. They are built to withstand the rigors of demanding work environments while providing reliable power. With their distinct features and durable designs, the DY35, DY30, and DY41 engines continue to be sought-after choices for professionals and hobbyists alike, underscoring Subaru's commitment to innovation and quality in power products.
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