GORMAN-RUPP AMT 3391-V9 Specifications Information And Repair Parts Manual

Specifications Information and Repair Parts Manual
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 specifications 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 insure proper operation. Unit must be clear of debris and sediment. Inspect for leaks and loose bolts. Failure
to do so voids warranty.
3-Inch Solids-Handling
Pedestal Pump
Refer to pump manual 1808-635-00 for General Operating and Safety Instructions.

DESCRIPTION

These high capacity, heavy-duty self-priming (to 20 ft. lift) pumps, are designed for direct coupling drive or pulley drive. Each pump is equipped with a
clog-resistant cast iron impeller capable of handling solids up to ¾" diameter. Pump is designed for operations involving irrigation and dewatering of
excavations, basements, etc. Handles liquids from 40̊ to 180̊ F (4̊ to 82̊ C). For use with nonflammable, non-abrasive liquids compatible with pump
component materials.

SPECIFICATIONS

Suction Inlet....................................................................3" NPT
Discharge Outlet..............................................................3" NPT
Shaft Diameter....................................................................1 ⅛"
Keyway...............................................................1/4 x 1/8 x 2 ¼"
Dimensions
(Overall).............................................L 20 ½" x W 10 ½" x H 13"
Weight............................................................................85 lbs.
Seals...........................3391-99 – Buna-N with carbon/ceramic faces
..................................3391-V9 – Viton with carbon/ceramic faces

Performance Chart

Pump Elec. Motor*
Speed Motor
RPM HP RPM PD
3.0"
1725 1 ½ 1800
2.5"
1 ½ 3600
5.5"
2800 5 1800
3.5"
5 ½ 3600
7.0"
3450 7 ½ 1800
3.5"
7 ½ 3600
Note: RPM listed are synchronous, actual RPM is very close to 3450 for 3600 and 1725 for 1800.
(*) Minimum electric motor HP required.
3391-252-00
Sheave
Pump No. of
PD Grooves 10'
3.0"
1 6,600
5.0"
1
3.5"
2 13,500
4.5"
2
3.5"
2 17,100
3.5"
2

MAINTENANCE

Make certain that unit is disconnected from power source before
attempting to service or remove any components! If power disconnect
is out-of-sight, lock it in open position and tag to prevent application
power.

MECHANICAL SEAL REPLACEMENT

Refer to Figures 1 and 2
IMPORTANT: Always replace seal seat (Ref. No. 7), seal head (Ref.
No. 6), and shaft sleeve (Ref. No. 5) to insure proper mating of
mechanical seal components!
1. Remove pump casing (Ref. No. 2), casing seal (Ref. No. 8)
and impeller (Ref. No. 3)
NOTE: Mechanical shaft seal consists of 2 faces, one stationary (seat)
and other rotating (head). When removing seal refer to Figure 2, and
carefully note position of seal faces and how they fit one to the other.
Seat is installed in adapter (Ref. No. 9) and head (located around
shaft) rides up against seat. The purpose of rubber components is to
seal parts to housings and shaft and/or shaft sleeve. The purpose of
stainless steel spring is to maintain pressure of carbon face to ceramic
face.
GPM at Total Head in Feet
20' 30' 40' 50'
− − −
3,120
12,000 10,140 8,160 5,280
15,900 14,700 13,200 11,460
1
3391-99 and 3391-V9
60' 70' 80' 90'
− − − −
− − −
840
9,900 7,800 5,100 1,500
Max
Head
23 ft.
61 ft.
92 ft.
4/2019