25
PowrTwin 5500™ Fluid
Pump Service Instructions
IMPORTANT: USE OF NON-SPEEFLO MANUFAC-
TURED SERVICE PARTS MAY VOID WARRANTY.
ASK FOR ORIGINAL PARTS MADE BY SPEEFLO
FOR BEST SERVICES.
The 143 Series Pump should
receive a routine servicing after approximately 1,000
hours of use. Earlier servicing is required if there is
excessive leakage from the top packing or if pump
strokes become faster on one stroke or the other. The
use of
Titan/Speeflo Piston Lube, Part # 700-925
, is
recommended as an upper packing lubricant.
DO NOT
SUBSTITUTE OIL, WATER, OR SOLVENT
for an upper
packing lubricant.
DISASSEMBLY
1. Remove Syphon Assembly. Unthread Foot Valve (15)
and Pump Cylinder (11) with strap wrench.
2. Slide the Retainer Ring (1) up with a small screwdriv-
er, then push the Connecting Rod Pin (2) out.
3. Pull Displacement Rod (6) through lower cavity of
Pump Block.
4. Remove Pump Block
PTFE
O-Ring (3), Packing
Spring (5), and Packing Set (4).
5. Hold Displacement Rod (6) in vise by the flats at top
of rod and remove Piston Seat (10) with wrench while
holding displacement rod horizontal with wooden support
if necessary. Remove Piston Ball (9), Packing Set (4),
Lower Packing Spring (8) and Spring Retainer (7).
6. Remove Ball Stop Cage (13),
PTFE
O-Ring (3) and
Foot Valve Ball (14).
7. Replace Connecting Rod Pin (2) and Retainer Ring
(1) .
8. Remove O-Ring (12) from Pump Cylinder (11)
REASSEMBLY
NOTE: USE
PTFE
TAPE ON ALL THREADED PIPE CON-
NECTIONS.
1. Install Pump Cylinder O-Ring (3) and (12) into O-Ring groove
of Pump Cylinder (11 ) and O-Ring (3) into Pump Block.
2. Place O-Ring (3) into Foot Valve (15).
3. Place Foot Valve Ball (14) in Foot Valve (15) and install Ball
Stop Cage (13).
4. Connect Foot Valve (15) to Pump Cylinder (11). Place Packing
Set (4) over Piston Seat (10).
CAUTION:
Peak of V packing must
point down toward Foot Valve (15). Place Piston Ball (9) on
Piston Seat (10). Follow with Lower Packing Spring (8) and
Spring Retainer (7). Thread Displacement Rod (6) onto Piston
Seat (10) tightly using red Loctite.
5. Insert Packing Set (4) into Pump Block.
CAUTION:
Peak of “V”
packing must point up toward motor. Place Upper Packing Spring
(5) (small end toward packing) into the lower cavity of Pump
Block behind Upper Packing Set (4).
6. Insert Displacement Rod (6) through lower cavity of Pump
Block. Rotate Displacement Rod until holes in Displacement Rod
and hydraulic piston rod line up.
7. Push Cylinder (11) over Packings (4) and connect to Pump
Block.
CAUTION:
O-Ring (3), and Packing Spring (5) must be in
place before connecting Cylinder (11) to Pump Block.
8. Attach syphon assembly.
ITEM
PART
NO.
NO.
DESCRIPTION
QUANTITY
*
235-929
Pump Block
1
*(See item No.m25 On Hydraulic Motor Assembly)
1
143-019
Retainer Ring
1
2
143-120
Connector Rod Pin
1
3
145-031
O-Ring,
PTFE
2
4
138-153
Packing Set, Leather/UHMPWPE/Steel
2
5
142-004
Packing Spring, SS
1
6
143-117
Displacement Rod, Severe Service 500
1
7
138-001
Spring Retainer
1
8
142-003
Packing Spring, SS
1
9
138-225
Ball, SS
1
10
143-945
Piston, Seat
1
11
143-822
Cylinder, Pump, Severe Service 500
1
12
140-009
O-Ring
1
13
145-032
Ball Cage, SS
1
14
920-103
Ball, SS
1
15
143-998
Foot Valve Assembly
1
Summary of Contents for 449-700
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