Little Giant G-100 Series Use and care manual

©Copyright 2002 Little Giant Pump Company Form #993083–1/02:
REPAIR PARTS LIST
ITEM DESCRIPTION PART
NO. QTY.
LG-100 575100 LG-102 575192 LG-300 575300 LG-302 575392
1Thumb Screw #10-24 x 5/8 909001 3 lll l
2 Clamp Screw #10-24 x 1/2 909009 2 lll l
2Clamp Screws #10 - 24 x 5/8 901521 2 ll
3Cover, LG-100 175202 1 ll
3Cover, LG-300 175252 1 ll
4Clamp, Tube, LG-100 175209 2 ll
4Clamp, Tube, LG-300 175258 2 ll
5Impeller Assy., LG-100 175006 1 ll
5Impeller Assy., LG-300 175007 1 ll
6Housing, LG-100 175201 1 ll
6Housing, LG-300 175251 1 ll
7Retaining Ring 923002 2 lll l
8Retaining Ring 923003 1 lll l
9Pulley, 6" 929201 1 lll l
10 Bolt 5/16-18 x 1 915503 2 ll
11 Lockwasher, 5/16 921032 2 ll
12 Nut 5/16-18 920018 2 ll
13 Screw, 1/4-20 x 3/8 901702 1 ll
14 Lockwasher, 1/4 921024 1 ll
15 Belt Guard 175105 1 ll
16 Base 175104 1 ll
17 Screw, #8-18 x 3/8 902404 3 ll
18 Feet 929102 4 ll
19 Bearing, Ball 948015 1 lll l
PUMP CONSTRUCTION
Little Giant tube pumps consist of a cylindrical aluminum housing that
accepts a flexible tube radially against the inside and an impeller assembly
consisting of ball bearings rotates in the cylinder. As the impeller rotates it
squeezes tubing which wil create a suction on the intake side and draw fluid
through the tubing creating a pumping action. Fluid being pumped never
touches any pump parts except for the tubing.
TUBING
Selection of proper tubing or each application is extremely important. Tubing
selected must be chemically inert to the materials being pumped. Three types
of tubing are most commonly used. They are: rubber, Tygon R3602 and
neoprene. All 3 types are sufficiently flexible and can be squeezed shut and then
rapidly regain their shape after the rollers pass over them. Tubing with the
hardness of 60 durometer gives good performance. The walI thickness for any
tubing used should be 1/8". The LG-100 series accepts 3/16" x 7/16" to 1/4" x
1/2" tubing. The LG-300 series accepts 3/8" x 5/8" to 1/2" x 3/4" tubing. Do not
use tubing with wall thickness over 1/8".
Little Pump Company
GIANT
INSTRUCTIONS AND
REPAIR PARTS LIST
FOR TUBE PUMP
LG-100 SERIES
AND LG-300 SERIES
Little Pump Company
GIANT
LITTLE GIANT PUMP COMPANY
3810 NORTH TULSA STREET, OKLAHOMA CITY, OKLAHOMA 73112
TELEPHONE [phone]
KEEP THIS FOLDER
File this for safekeeping. It may be valuable to you for service under the terms of the warranty
Model # _____________________________________ Date of Purchase _________________________
Catalog # ________________________ Serial # _____________________________________________
Name of Dealer ________________________________________________________________________

PUMP DRIVE
Little Giant tube pumps work well at any speed up to 800 RPMs. The
pump is supplied with a 6" pulley. When combined with a 2-1/2" motor
pulley and a 1,725 RPM motor, pump speed will be approximately 700
RPMs.
NOTE: Motor, motor pulley and V-belt are not included with the
LG-100 series and LG-300 series Tube Pumps.
Recommended motor for either pump series is a 1/3 HP, 60 hertz, 1,725
RPM NEMA 48 frame motor with rigid cradle base, sleeve bearings, thermal
protection, 40°C rise, 1.35 service factor, and insulation class A. Suggested
motors are Dayton 6K490, General Electric 5XBH024, or Marathon
Q48S17D596. The motor pulley should be 2-1/2" OD for type A (or 4L) V-belt
for ½" shaft (Grainger 3X900 or equivalent). The belt should be a 4L width. Belt
length using Little Giant base should be 30" (Grainger 4L-300 or equivalent).
TUBING INSTALLATION
Remove the pump housing cover by removing the 3 cover thumb screws.
Position the impeller parallel to the pump's base. Place the tubing in one of the
grooves in the pump housing and rotate the impeller while placing the tubing in
the position behind the turning impeller. Seat the tubing fully up against the
back of the housing. Be sure the impeller bearings press the tubing evenly
against the housing and does not overhang the bearings as they turn.
Improper positioning of the tubing will cause wear and tubing will be cut by the
impeller bearings. Silicon lubricant on the tubing where the impeller bearings
rub will increase the tubing life. When replacing the cover, adjust the tubing
clamps until they hold the tubing tight enough so that it cannot be pulled
through the pump when the cover is installed. For ¾" O.D. tubing, use the
#10-24 x ½" screws installed at the factory. For 5/8" O.D. tubing, remove the
clamp screws (2) and install the #10-24 x 5/8" screws which are supplied with
the pump in a separate plastic bag. If the clamps are too tight the flow will be
restricted.
OPERATION AND SERVICE
Do not restrict the pump's output any more than necessary. The pump can
build up high pressures that could exceed the tubing's strength.
Some pulsating in the discharge is unavoidable because of the peristaltic action
and can be reduced by putting an expansion tank in the discharge line. Using 1/8"
wall thickness tubing, the pump is self-priming.
Maintenance must be performed regularly. The rollers' constant squeezing
and releasing the tubing wears the tubing out. Silicon lubricant on the tubing
lengthens tubing life. If possible, install tubing longer than is required and
periodically loosen the cover plate and slide the tubing through the pump
approximately 1 foot to allow the roller to wear on new sections of the tubing.
Tubing must be periodically replaced. All pump bearings are sealed and require
no maintenance.
Model Length Height Width Gallons Per Minute @ Tubing Size R.P.M. Weight
3/16 x 7/16 1/4 x 1/2 3/8 x 5/8 1/2 x 3/4
LG-100 6" 6 1/2“4
7/8” .6 1 — — 575 4.6
LG-101 15" 9 3/8“9
5/8” .6 1 — — 575 25.2
LG-300 6 1 /8“6
1/2”5 1/2“ — — 2.8 4.8 575 6.6
LG-301 15" 9 3/8“9
5/8” — — 2.8 4.8 575 26.12
The above G.P.M. remains almost constant at any pressure from 1–20 P.S.I.
ONE YEAR LIMITED WARRANTY
For one year from date of purchase, Little Giant will repair this
pump if defective in material or workmanship. Warranty service is
available by returning the pump prepaid tho the factory. For further
details, please consult the warranty statement. This warranty gives
you specific legal rights and you may also have other rights which
vary from state to state. Little Giant Pump Company, Service
Department.