| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce manufacturing costs by facilitating mounting and dismounting works of an additional pump and removing a cover and a gear for adding the additional pump. SOLUTION: An additional pump adding device 30 capable of being mounted on and dismounted from a rear casing 10 is composed of the gear cover 31 capable of being attached to and detached from the rear casing 10, the drive gear 34 provided in the gear cover 31 and connected with a second rotary shaft 15, and a driven gear 38 provided in the gear cover 31 by meshing with the drive gear 34 and connected with the additional pump 42. Consequently, the additional pump 42 can be simply added by attaching the additional pump adding device 30 to the rear casing 10 and attaching a pilot pump 41 and the additional pump 42 to the additional pump adding device 30. Furthermore, the pilot pump 41 only can be attached to the rear casing 10 by removing the additional pump adding device 30.</p> |
