March TE-7R-MD Use and care manual

www.PumpAgents.com
INSTRUCTIONS & REPAIR PARTS FOR MODELS
TE-7R-MD, TE-7K-MD, AND TE-7S-MD PUMPS
PUMP CONSTRUCTION & SERVICING
The TE-7-MD pump was designed to handle a wide range of acids,
bases, caustics, solvents and other corrosive liquids.
March “Orbital” Magnetic Drive Pumps eliminate the conventional
shaft seals found in most pumps. This means that there is no
rotating shaft or seal to wear and allow the liquid being pumped to
leak out. The only seal in the pump is a stationary “O” ring seal
between the front and the rear Housings. The only moving part
other than the motor is the Impeller-Magnet Assembly, which
rotates on a stationary spindle and up against a thrust washer.
These are the only parts that might wear and, may require
replacement.
METAL PUMP ONLY
The Impeller (item 7), ceramic shaft (item 6), and ceramic Thrust
washer (item 5) are packed separately within the pump carton to
prevent damage during shipping. These items need to be
assembled into the pump before installation. Be sure all parts are
assembled per the exploded view shown.
PUMP DISASSEMBLY AND INSPECTION
To disassemble the pump, simply remove the six Housing Screws
(item 1). The entire wet end assembly up to the Motor Bracket (item
10) will now slide apart. The Impeller Magnet Assembly (item 7) will
slide off the Spindle (item 6).
The Spindle is a snug fit into the front Pump Housing
and the rear Impeller Magnet Housing. It may be
necessary to twist the Spindle to pull it free. Replace
any worn or damaged parts if necessary.
ELECTRICAL & OPERATION
Pumps are not self priming and will not produce a
suction lift and must be in stalled with a positive flooded
suction. The only moving parts inside the pump volute
are the Impeller-Magnet Assembly (item 7) and the
Impeller Bushing, which rotates on the Ceramic Spindle
(item 6). If the pump is run with no liquid inside the
pump volute, there is danger of damaging the Impeller
Bushing. Short runs of 30 seconds or less will not
damage the pump. This will allow you time to check
your electrical hookup. The electrical wiring diagram is
located inside the cover of the motor conduit box. The
Impeller must rotate in a clockwise direction when
viewed through the inlet of the pump. The totally
enclosed motor for 7R,7K is ¾ H.P., 115/230 volts;
50/60 Hz; single phase; rated for continuous duty;
capacitor start; No. 56 “C” Nema Frame with rigid base.
Standard Nema motor mounting on 11/32 wide slots on
3-inch centerlines. Motors available in 230/460 three
phase current, 50/60 Hz, TEFC, in ¾ H.P,1 H.P., and
1½ H.P. Explosion-proof motors are also available in 1
and 1½ H.P.
RATINGS AND SPECIFICATIONS
MODEL MOTOR SPECIFICATIONS MAX. MAX. CONNECTORS DIMENSIONS
NO. VOLTS PHASE RPM H.P. AMPS G.P.M. HEAD INLET OUTLET HT. WD. LG.
7R,7K 115/230 One
3450 ¾ 10/5 53 60 Ft. 1” MPT 18”
230/460 Three 2.2/1.1
7S 115/230 One 1 11.8/5.9 1-1/2” FPT 9-1/16” 9-1/4” 18-3/8”
230/460 Three 3/1.5
Ratings based on pumping water. Overall dimensions may vary depending on the motor used.
PumpAgents.com - buy pumps and parts online
PumpAgents.com - Click here for Pricing/Ordering

www.PumpAgents.com
NOTE: When replacing Impeller Bushing in the field:
The plastic bushing must be bored to size after they have been pressed into the
impeller. Bore to .378/.381 I.D. The carbon and ceramic bushings are to finished size
and do not require boring.
When attaching drive magnet (item 9) to the motor shaft, position the face of the drive
magnet 1/16 inch below the face of the motor bracket (item 10)
REPAIR PARTS
USED IN ITEM DESCRIPTION QTY. PART NO.
All 7s 1 Screw – Stainless 6 0155-0014-1000
7R, 7K 2 Washer – Stainless 6 0155-0021-1000
7R 3 Front Housing – Polypropylene 1 0155-0011-1000
7K 3A Front Housing – Kynar®1 0155-0125-1000
7S 3B Front Housing – 316 Stainless 1 0155-0036-0000
All 7s 4 “O” Ring – Viton®1 0155-0010-1000
All 7s 5 Washer – Ceramic 1 0155-0009-1000
7R, 7K 6 Shaft – Ceramic 1 0155-0039-1000
7S 6A Shaft – Ceramic 1 0155-0117-1000
7R 7 Impeller Assembly – Polypropylene (w/Teflon®/ Ryton®Bushing) 1 0155-0159-0500
7K 7A Impeller Assembly – Kynar®(w/Carbon Bushing) 1 0155-0160-0200
7S 7B Impeller Assembly – 316 Stainless (w/Carbon Bushing) 1 0155-0112-0400
7R 8 Rear Housing – Ryton (w/Rear Ceramic Thrust Washer) 1 0155-0067-0100
7K 8A Rear Housing – Kynar (w/Rear Ceramic Thrust Washer) 1 0155-0124-0100
7S 8B Rear Housing – 316 Stainless 1 0155-0035-0000
All 7s 9 Drive Magnet Assembly 1 0155-0130-0200
All 7s 10 Motor to Pump Connecting Bracket – Ryton 1 0155-0092-0100
7R, 7K 11 Motor – TEFC – ¾ H.P. – 1 Phase – 115/230 Volts 1 0155-0016-1000
7R, 7K 11A Motor – TEFC – ¾ H.P. – 3 Phase – 208/230/460 Volts 1 0155-0022-1000
7S 11B Motor – TEFC – 1 H.P. – 1 Phase – 115/230 Volts 1 0155-0173-1000
7S 11C Motor – TEFC – 1 H.P. – 3 Phase – 208/230/460 Volts 1 0155-0174-1000
All 7s 12 Washer – Stainless 4 0155-0019-1000
All 7s 13 Screw – Stainless 4 0155-0017-1000
A
lternate materials are available. Contact the factory for assistance in determining the best
recommended materials for your particular applications.
LIMITED WARRANTY
March pumps are guaranteed only against defects in workmanship or materials for a period of one year from date of manufacture
pumping water. On all other solutions, contact the factory for application assistance. March Pump Application Worksheet 750-130-
10 is available for additional warranty information.
1819 PICKWICK AVE., GLENVIEW, IL 60026-1306, U.S.A 0155-0046-1000 R13
PumpAgents.com - buy pumps and parts online
PumpAgents.com - Click here for Pricing/Ordering