Service Manual

15
BDP-10A/16A/21L
SECTION 5. REPAIR
HOW TO USE THIS MANUAL
Each assembly is provided with an exploded
view showing the parts involved. The item
reference numbers in each illustration are
for assembly instructions only. See pages
35-40 for part names and descriptions. A
complete exploded view and item list of the pump
is provided at the end of this section.
GENERAL INSTRUCTIONS
Cleanliness is a primary means of assuring
satisfactory life on repaired pumps. Thoroughly
clean all exposed surfaces prior to any type of
maintenance. Cleaning of all parts by using a
solvent wash and air drying is usually adequate.
As with any precision equipment, all parts must
be kept free of foreign material and chemicals.
Protect all exposed sealing surfaces and open
cavities from damage and foreign material. The
external surfaces should be cleaned before
beginning any repairs.
Table 3. Required Tools
Miscellaneous
BDP-10A/16A/21L Service & Repair Manual
Torque Wrench
Scribe, Paint Pen, or Marker
Seal Hook with a Magnet
Flat Blade Screw Driver
Pliers
Internal Snap Ring
Allen Wrenches
5 mm
3/16”
1/4”
Sockets
3/8” Drive Ratchet
9/16”
1/2”
5/8”
10 mm
Combination Wrenches
9/16”
1/2”
5/8”
7/8”
10 mm
TOOLS AND TORQUES
Lip type seals (shaft seals) are used on the input
shaft and directional control shaft of the
BDP-10A, 16A and 21L. These seals can be
replaced without major disassembly of the unit.
However, replacement of these seals generally
requires removal of the pump from the machine.
Upon removal, it is recommended that all seals,
O-rings and gaskets be replaced. During
installation lightly lubricate all seals, O-rings and
gaskets with a clean petroleum jelly prior to
assembly. Also protect the inner diameter of the
seals by covering the shaft with a cellophane
(plastic wrap, etc.) material.
Parts requiring replacement must be replaced
from the appropriate kits identified in the Items
Listing, found at the end of this manual. Use only
original Hydro-Gear replacement parts found
listed in BLN-50937 (microfiche) or BLN-51427
(CD).