5-2 Lower Mechanism: Travel Drive Unit 6.) Assembling the cylinder block assembly (1-4) 6-1.)
Place the cylinder block (1-4-1) on the work bench of a manual press with its surface sliding against the valve plate (121) up. With the graded side of the collar (1-4-6) down, assemble it into the cylinder block (1-4-1), and place the spring (1-4-7) and the collar (1-4-8), in that order, on the collar (1-4-6).
6-2.)
Using a jig, press in the upper surface of the collar (1-4-8) and assemble the snap ring (1-4-5). Note: a.When assembling the snap ring (1-4-5) with snap ring pliers, the snap ring may drop out of the snap ring pliers due to its hardness, leading to injury. When assembling the snap ring, always use a jig and check that the claws of the snap ring pliers are engaged in the snap ring hole before proceeding with the work. b.When it is difficult to contract the snap ring, use snap ring pliers that are onesize larger than required. c.When pressing in the collar (1-4-8), be sure to align the center of the cylinder block with that of the press.
6-3.)
Place the cylinder block (1-4-1) on the work bench with its surface sliding against the valve plate (1-21) down. Assemble 3 pins (1-4-9) into the inclined holes of the cylinder block. Note: a.When placing the cylinder block (1-4-1) on the work bench, check that no foreign matter is present on it. b.Take care not to damage the sliding surface of the cylinder block (1-4-1) that slides against the valve plate (1-21). Damaging the sliding surface may affect the motor performance, which may lead to early failure of the motor. c.When assembling the pin (1-4-9), assemble it after applying grease in the pin halls.
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