YAMADA NDP-H50, Maintenance Manual, Page: 4 / 18

1
Fig.2.1
Fig.2.2
(Part No. 771868)
(Part No. 804129)
1.Principles of operation
There are two diaphragms fixed to the center rod, one at each end. When compressed air is supplied to air
chamber b (right side, see Fig.1.1), the center rod moves to the right, the material in material chamber B
is pushed out, and at the same time material is sucked into material chamber A.
When the center rod is moved full-stroke to the right, the air switch valve is switched, compressed air is
sent to air chamber a (left side, see Fig.1.2), and the center rod moves to the left. The material in
material chamber A is pushed out, and at the same time material is sucked into material chamber B.
Through repetition of this operation, material is repeatedly taken in and discharged out.
2.Tools, etc.
2.1 General tools
·Socket wrenches 13mm, 17mm, 19mm (except with the NDP-H40 BP
□
)
24mm (BA
□
, BS
□
, BF
□
)
·Hexagonal box wrenches 5mm, 6mm
·Small crowbars 2 (B
□
C, B
□
N, B
□
E, B
□
V)
·Open-end wrenches 17mm (NDP-H40 BP
□
), 19mm (BA
□
, BS
□
, BF
□
)
24mm (BA
□
, BS
□
, BF
□
)
·Phillips-head screw driver
2.2 Special tools
·PP wrench (sold separately) · Socket for a guide (sold separately)
Purpose: Removing the center disk Purpose: Removing the throat bearing
of BP
□
type
2.3 Misc.
·Assembly oil Turbine oil none addition class 1 (equivalent to ISO VG32 grade)
·Nuts M16
X
1.5
·Thread locker
·Grease Urea grease grade (NLGI) No. 2
Shell Alvania Grease S1
3.Ordering Replacement parts
For accurate and speedy shipment of parts, be sure to order the right parts for your model to distributor.
Indicate the part numbers, descriptions, and quantities.