AMT Submersible Pump 12V DC Series Owner's manual

Specications Information and Repair Parts Manual 5891-DC
5891-250-00 1 12/2019
Please read and save this Repair Parts Manual. Read this manual and the General Operating Instructions carefully before attempting to assemble, install, operate
or maintain the product described. Protect yourself and others by observing all safety information. The Safety Instructions are contained in the General Operating
Instructions. Failure to comply with the safety instructions accompanying this product could result in personal injury and/or property damage! Retain instructions
for future reference. AMT reserves the right to discontinue any model or change specications at any time without incurring any obligation.
©2019 AMT Pump Company, A Subsidiary of The Gorman-Rupp Company, All Rights Reserved.
Periodic maintenance and inspection is required on all pumps to ensure proper operation. Unit must be clear of debris and sediment. Inspect for leaks and loose bolts. Failure to do so
voids warranty.
Submersible Pump 12V DC Series
Refer to pump manual 1808-636-00 for General Operating and Safety Instructions.
DANGER: Not for use with uids that have a ash point below 100º F
(38º C) (Example: gasoline, alcohol). Sparking could result in death.
OPERATING AND INSTALLATION INSTRUCTIONS
Hose: Since the pump develops relatively low pressure, it is recommended
that non-collapsible hose be used for maximum pumping rates.
Hoisting and Lowering: Attach a line to the handle (Ref. 7) on the top of the
pump for hoisting or lowering the unit. Do not use power cable for handling
unit. LIFTING BY POWER CABLE VOIDS WARRANTY.
To Operate: Lower unit into liquid to be pumped and activate switch. Do not
run dry; damage to shaft seal will result.
RUNNING TIME: This unit draws about 30 amperes and can be operated about
1 hour on a fully charged 55 amp-hour battery and still permit starting of vehicle
under normal conditions. Caution should be used when running time exceeds
30 or 40 minutes without engine running to recharge battery, particularly in cold
weather when battery e󰀩ciency is lowered. Battery size (amp-hour rating) and
the use of other accessories such as lights and radios, etc. must be taken into
consideration for practical running periods without engine running.
OVERLOAD PROTECTION is provided by means of a 40 amp automatic reset
circuit breaker located under top end cap (Ref. 9) on the back of the motor
(Ref. 13).
TROUBLE SHOOTING
NOTE: Most common cause of failure to run is due to hardened mud and sand
at impeller. Remove strainer (Ref. 26) to check.
Should unit not operate, always check freeness of rotation of impeller
by inserting screwdriver through hole in casing (Ref. 25) into slot in end
of shaft.
MOTOR WILL NOT RUN:
1. Poor connection at battery.
2. Impeller locked with foreign material.
3. Insu󰀩cient impeller clearance.
4. Damaged power cable or loose connection internally in motor assembly.
5. Bad switch or circuit breaker. Connect power leads directly to motor leads
to check.
6. Worn motor brushes or out of position to make contact with armature.
PERFORMANCE LOW:
1. Strainer screen partially plugged.
2. Impeller rubbing. Check freeness of rotation with screwdriver inserted
through hole in casing into slotted end of shaft.
3. Battery not fully charged.
4. Discharge restriction such as kinked hose or excessive discharge head.
MOTOR RUNS BACKWARDS:
1. Check wiring for correct polarity.
SERVICE & REPAIR INSTRUCTIONS DISASSEMBLY:
Impeller and shaft seal can be inspected and serviced from lower end of pump
by removal of the casing via 4 screws (Ref. 19). Screwdriver slot is provided in
end of motor shaft to turn shaft while holding impeller for removal. This permits
removal of impeller without disassembly of upper motor housing to hold motor
shaft.
Alternately, there is a shaft extension with two ats on the rear of the motor for
use when the impeller is di󰀩cult to remove. The top end cap must be removed
to expose this shaft extension.
To replace power cord, remove 4 hex ange nuts (Ref. 15) and bump top
end cap free from cylinder (Ref. 14). Loosen the power cord grips (Ref. 5)
around the wires and raise top end cap su󰀩ciently to disconnect power cable
connections. Slide cylinder up from adapter (Ref. 18) and motor will be exposed
for wiring of new cord.
Make certain that wire leads are installed per Figure 1. Install top end cap
around cylinder. Use lubricant for easier installation with O-Ring (Ref. 12).
Make sure wires do not contact motor shaft when installing motor cover.
DESCRIPTION
The AMT Submersible 12V DC pump is designed for use in remote locations without electricity and for emergency back-up during power failure. Unit comes
assembled and requires minimum 55 amp-hour battery for proper operation. For use with non-ammable liquids compatible with pump components.
Read all safety warnings and instructions in this manual completely before installation and start-up of the pump. It is the responsibility of the
purchaser to retain this manual for reference. Failure to comply with the recommendations stated in this manual will damage the pump and void
factory warranty.
1. Make sure the vehicle and the pump are not in contact during connection.
2. Do not use power cable for handling unit.
3. Do not run pump completely dry for extended periods. Damage to shaft seal may result.
Figure 1 - Wiring Diagram

Specications Information and Repair Parts Manual 5891-DC
5891-250-00 2 12/2019
For Repair Parts contact dealer where pump was purchased.
Please provide following information:
-Model Number
-Serial Number (if any)
Part description and number as shown in parts list
Figure 2 - Repair Parts Illustrations
Submersible Pump 12V DC Series

Specications Information and Repair Parts Manual 5891-DC
5891-250-00 3 12/2019
Ref
No. Description Part Number QTY
1 Battery Clamps Incl. w/ Ref 28 2
2 Switch 5891-362-00 1
3 Switch Box Incl. w/ Ref 28 1
4 Power Cord Incl. w/ Ref 28 2
5 Power Cord Grips Incl. w/ Ref 28 6
6 Hex Flange Screw Incl. w/ Ref 7 2
7 Handle Kit 5891-100-96 1
(includes Ref. Nos. 6 & 7)
8 Plug Incl. w/ Ref 9 1
9 Top End Cap Kit 5891-020-96 1
(includes Ref. Nos. 8 & 9)
10 Tie Rod Kit 5891-700-90 4
(includes Ref. Nos. 10 & 15)
11 Paper Gasket Incl. w/ Ref KIT 2
12 O-Ring Incl. w/ Ref KIT 2
13 Motor REPLACE PUMP 1
14 Cylinder Kit 5891-600-96 1
(includes Ref. No. 14)
15 Flange Nut Incl. w/ Ref 10 4
16 Carbon Bearing Incl. w/ Ref 18 1
17 O-Ring Incl. w/ Ref KIT 8
18 Adapter Kit 5891-030-96 1
(includes Ref. Nos. 16, 18 & 20)
19 Screw Incl. w/ Ref 25 4
20 Screw Incl. w/ Ref 18 4
21 Mechanical Seal Assembly 1640-161-90 1
22 Shims Incl. w/ Ref 24 4
23 Back Plate Kit 5891-021-96 1
(includes Ref. No. 23)
24 Impeller Kit 5891-010-96 1
(includes Ref. Nos. 22 & 24)
25 Casing Kit 5891-001-96 1
(includes Ref. Nos. 19 & 25)
26 Strainer Kit 5891-170-90 1
(includes Ref. Nos. 26 & 27)
27 Screw Incl. w/ Ref 26 3
28 Cord & Switch Kit 5891-360-96 1
(includes Ref. Nos. 1, 2, 3, 4 & 5)
KIT Gasket/O-Ring Kit 5891-300-90 1
(includes Ref. Nos. 11, 12 & 17)
Repair Parts List

Specications Information and Repair Parts Manual 5891-DC
5891-250-00 4 12/2019