SKF Lincoln 274874 Product manual

Hose reel pump assembly
Models 274874 and 276360
Installation and maintenance guide
Version 01
Date of issue September 2012
Form number 404468
Section A21
Page 8C

Table of Contents
Safety ......................... 2
Description ..................... 2
Appropriate Use .................. 3
Performance Specifications ......... 3
Wiring Diagram .................. 3
Pump Installation ................ 3
Pressure Switch Adjustment
Procedure ...................... 4
Maintenance and Repair. . . . . . . . . . . 4
Pressure Switch .................. 4
Inspection and Repair ............. 5
Pump Dimensions ................ 7
Repair Parts List ................. 10
Safety
Read and carefully observe these operating
instructions before unpacking and operating
the pump! The pump must be operated,
maintained and repaired exclusively by per-
sons familiar with the operating instructions.
Local safety regulations regarding installa-
tion, operation and maintenance must be
followed.
Operate this pump only after safety
instructions and this service manual are
fully understood.
Safety instructions
This equipment generates very high grease
pressure.
Inspection
If overpressurizing of the equipment is
believed to have occurred, contact the fac-
tory authorized warranty and service center
nearest you for inspection of the pump.
Specialized equipment and knowledge is
required for repair of this pump. Contact the
factory authorized warranty and service
center nearest you for repair or adjustments
other than maintenance specified in this
manual.
Annual inspection by the factory author-
ized warranty and service center nearest
you is recommended.
A list of factory authorized warranty and
service centers is available upon request.
Damaged pumps
Any pump that appears to be damaged in
any way, is badly worn or operates abnor-
mally, shall be removed from use until
repairs are made. Contact the factory
authorized warranty and service center
nearest to you for repairs.
Description
The hose reel pump assembly is a portable
5 gallon (19 liter) pump intended to operate
from a 12 or 24 V DC power source, depend-
ing on model, for dispensing grease or other
lubricant through a hose and control valve.
Model 274874 is 24 V DC and model
276360 is for 12 V DC operation. The
pumps include a pressure switch in the wir-
ing harness to turn off the pump when
maximum pressure is achieved.
Model 274874 is a 24 V DC, 5 gallon
(19 liter), 7:1 ratio FlowMaster pump. Model
276360 is a 12 V DC, 5 gallon (19 liter),
19:1 ratio, FlowMaster pump.
The pump outlet pressure is controlled by
a pressure switch, 274630, mounted on the
rear of the pump housing. An outlet check
(32) is connected to the pump outlet to
maintain pressure on the hose reel, mini-
mizing leak-back through the pump. A safe-
ty unloader (30) prevents pressure from
exceeding 7,000 psi (483 bar). A manifold
(29) is used for connections to the pump
outlet. The manifold includes a pipe plug
(28) that can be removed for installing an
optional pressure gauge, 274872. These
features are included on all models.
Models 274887 and 276359 consist of a
pump, bucket cover assembly, follower, hose
reel (which includes swivel and control
valve), and a 7 ft. (2,13 m) connecting hose.
Refer to kits table on page 9 for appropri-
ate models.
Models 274886 and 276358 consist of a
pump, bucket cover assembly, and follower.
Refer to kits table on page 9 for appropri-
ate models.
Indicates a hazardous situation which, if
not avoided will result in death or seri-
ous injury.
Warning
Indicates a hazardous situation which,
if not avoided, could result in minor or
moderate injury.
Caution
Extreme caution should be used when
operating this equipment as material
leaks from loose or ruptured compo-
nents can inject fluid through the skin
and into the body causing serious bodily
injury. Adequate protection is recom-
mended to prevent splashing of material
onto the skin or into the eyes.
If any fluid appears to penetrate the
skin, get emergency medical care imme-
diately. Do not treat as a simple cut. Tell
attending physical exactly what fluid was
injected.
Caution
Do not exceed maimum rated outlet
pressure for these pumps. Exceeding
rated pressure may result in damage to
system components and personal injury.
Warning
2

Pump installation
Appropriate use
The reel and flow kit is intended for use in
mobile applications where there are grease
points that require the use of a grease fitting
due to abusive environments or an inability
to reach the lube point with a grease hose.
An example of this situation is the bucket
lubrication points on an earth mover or
backhoe. The reel and flow kit can also serve
well in applications where a lower cost option
to a full automated lubrication system is
desired.
Wiring diagram
Product specifications
Operating temperature –20 to 140 °F (–29 to 60 °C)
Operating voltage
Model 274874 24 V DC (18 to 32 V DC)
Model 276360 12 V DC (9 to 16 V DC)
Motor
Model 274874 0.33 HP (0.25 kw)
Model 276360 0.25 HP (0.19 kw)
Output/pump cycle 0.07 cu. in. (1,15 cu. cm)
Pump output
Model 274874 18.0 cu. in./min. (295 cu. cm/min.) at 0 psi (0 bar) backpressure
15.0 cu. in./min. (246 cu. cm/min.) at 6000 psi (414 bar) backpressure
Model 276360 7.0 cu. in./min. (115 cu. cm/min.) at 0 psi (0 bar) backpressure
4.9 cu. in./min. (80 cu. cm/min.) at 5000 psi (345 bar) backpressure
Weight 35 lbs (16 kg)
!Notice
A separate fuse should be wired
between the pump and power supply on
the positive leg of the circuit.
Pump motor is polarity sensitive and
will not run if connected incorrectly.
1 Mount the hose reel and pump in the
desired location.
2 Connect the pump outlet from the mani-
fold to the hose reel inlet using the sup-
plied hose and fittings. If the optional
pressure gage is used, install it in the
manifold by removing the plug and
screwing the gage into the manifold port.
3 Apply a teflon based pipe dope on fitting
threads to ensure proper sealing.
3

Pressure switch
adjustment procedure
The pressure switch is factory set at
5,800 psi (400 bar). Since setting the pump
shutoff pressure lower results in increased
pump life, the shutoff pressure should be set
no higher than the application requires. The
shutoff pressure can be adjusted by the fol-
lowing procedure:
1 Loosen adjustment stem locknut (12)
(† fig. 1).
2 Using a 5/16 hex head Wrench, turn the
adjustment spring cap (11) clockwise to
increase (or counterclockwise to decrease)
the pump shut-off pressure. Turn the
stem 1/8 of a turn at a time, checking the
setting by releasing the pressure and
allowing it to build again. If the optional
pressure gage is not used, install a tem-
porary gage in the provided manifold port
until the switch is reset. Do not exceed a
shutoff pressure of 6,000 psi (414 bar).
3 While holding the adjustment stem with
the 5/16 in. hex head wrench, retighten the
locknut.
4 Check the setting once more to ensure
the adjustment stem did not move when
the locknut was retightened.
Maintenance and
repair
Pressure switch
While the pressure switch will provide years
of service, in time, components will wear
out. It is possible to replace the switch ele-
ment and all of the soft parts to overhaul
the pressure switch. To disassemble this as-
sembly, († fig. 1):
1 Remove the pressure switch from the
pump by removing the two 1/4-20
screws holding the unit to the suport
bracket and unscrewing the adaptor fit-
ting (1) from the manifold. Next, unplug
the electrical connector to free the
switch from the assembly.
2 Remove the four cover screws (24)
along with the cover (23) and cover
gasket (22).
3 Remove the switch connector by the
following procedure:
3.1 Pull back the boot (15) from the
connector body and slide it back
down the wire about 1 in. (25 mm).
3.2 Pull out locking wedge (13) using a
needle nose pliers.
3.3 Wire terminals (16) can be freed
from the connector body (14) by
pushing back a locking tab inside
the connector body (14) while pull-
ing on the individual wire. A small
screwdriver is needed to depress
this tab.
3.4 With the connector body removed,
pull the boot (15) off of the wire.
4 Loosen and remove the cap and rubber
plug from cord grip connector (17).
5 Remove the cord grip connector body
(17) from the switch body (16).
6 Remove the two screws (19) and pull
out the switch and wire assembly (18).
7 Remove the ball (20).
8 Remove the adaptor fitting from the
switch body (1).
9 Loosen the jam nut (12) and remove
the spring cap (11) using a 5/16 in. hex
head wrench. Jam nut (12) and thread
seal (10) can remain in place on spring
cap (11).
10 Loosen the spool stop (9) using a 1 in.
open end wrench and remove from
body (6).
11 Remove the spring (25).
12 Using a small rod or stiff wire .093 in.
(2,4 mm) or smaller, push the spool
assembly (7) up from the bottom to
remove it from the larger opening in the
body. The rod must contact the 1/8 in.
(3,1 mm) dia. plunger rod on the
underside of the spool assembly (7) to
push the plunger rod through the cup
seal (4).
13 The cup seal (4) and the backup washer
(5) are held in place by a push-in
retainer (3). The retainer (3) grips the
smooth bore in the switch body (6) and
must be broken to remove. Using a
small flat bladed screwdriver, wedge the
retainer on its outside diameter and
push it toward the center of the bore.
This will bend or break the retainer. Re-
peat this operation in two or three
evenly spaced locations on the outside
diameter of the retainer until it falls out.
14 Pull out the cup seal (4) and backup
washer (5) using a stiff wire with a hook
bent into it.
4

Pump
Please refer to the FlowMaster pump ser-
vice sheet for information on the pump
(† table on page 9).
Inspection and repair
Inspect the steel plunger (7) to ensure there
are no gouges or scratches that would pre-
vent proper sealing. Inspect the switch body
(6) for signs of mechanical damage that
would prevent proper function. Also inspect
the spring (25) to ensure it is serviceable. If
these parts are usable, it is recommended
that the following seals be replaced:
• Gasket (22)
• Backup washer (5)
• Cup seal (4)
• Retainer clip (3)
• O-ring (8)
• O-ring (2)
• Thread seal (10)
In addition, it would be advisable to also
replace the switch element (18). The switch
contacts can be inspected by carefully and
evenly prying the cover from the plastic
switch body. These contacts can be cleaned
if they are not pitted, but it is advisable to
replace the entire switch element (18) if the
seals need to be replaced or if the unit fails
to operate for an unknown reason.
Reassembly
1 Place backup washer (5) and cup seal (4)
in the body (6). Be sure parts are seated
against the bottom of the bore. It is very
important to place the backup washer in
first, and then the cup seal. Be sure that
the cup lips point outwards, away from
the backup washer.
2 With the concaved surface out, push the
retainer clip (3) into the seal bore so that
it lightly touches or not quite touches the
cup seal. (See fig. 2).
3 Replace all parts in the reverse order of
disassembly. Lightly coat the rubbing sur-
faces of the spool (7) and the ball (20) as
well as both o-ring seals with a good
quality NLGI grease to ease reassembly.
4 Torque all threaded joints to the torque
specified in Table 1.
Table 1
Torque specifications
Spool stop (9) 18 to 22 ft.lbf.
(24 to 30 Nm)
Jam nut (12) 12 to 15 ft.lbf.
(16 to 20 Nm)
Adapter (1) 12 to 15 ft.lbf.
(16 to 20 Nm)
Cover screws (24) Torque until the gasket
measures 0.015 to
0.020 in. (0,38 to
0,5 mm)
Switch screws (19) Snug up. Do not
deform switch housing
5 Re-install the pressure switch on the
pump and reset to the desired setting per
the previously described procedure.
Do not set above 6,000 psi (414 bar).
5

Fig. 1
274630 Pressure switch
6

Fig. 2
*
* Indicates change
7

Fig. 3
Bucket cover assembly 274878
Exploded view
Parts not shown:
33152 Pump mounting gasket, 1 required
50169 1/4-20 x 3/4 in. hex bold, 4 required.
8

Kits and Accessories
The hose reel pump assembly 274773 is
intended to be used in kits that include all
parts necessary to mount and dispense
grease to grease points that are not serviced
by an automated lubrication system. The table
below lists the kits and accessories available.
Kits
Model Description Voltage
Pump, manifold and
pressure switch Lid Follower
Reel, control valve
and swivel
Connecting
hose
274886 Pump w/bucket lid and
follower
24 V DC 274874 274878 274888 NA NA
276358 Pump w/bucket lid and
follower
12 V DC 276360 274878 274888 NA NA
274887 As above with reel, 50 ft.
hose, control valve swivel
and connecting hose
24 V DC 274874 274878 274888 94553H 276366
276359 As above with reel, 50 ft.
hose, control valve swivel
and connecting hose
12 V DC 276360 274878 274888 94553H 276366
Service
page
Sec A21,
pg 8 series
Sec A21,
pg 8 series
Sec A21,
pg 8 series
Sec. E35,
pg 73 series1)
NA
Accessories
Part no. Description
274872 10,000 psi (689 bar) pressure gauge
274934 35 lbs./5 gallon (16 kg/19 liters) container mount
1) See service page sec. F3, pg. 2 series for service information on model 3050 control valve. See service page sec. F1, pg. 3 series for service information on model 81729 swivel.
9

Repair parts for pump and pressure switch
Item no. Qty. Description Part no.
1 1 Adaptor 274620
2 1 O-ring (included with item 1)1)
3 1 Retainer 274613
4 1 Seal 274617
5 1 Backup washer 274616
6 1 Pressure switch body 274621
7 1 Spool assembly 274614
8 1 O-ring 274619
9 1 Spool stop 274618
10 1 Thread seal 274841
11 1 Adjustment screw 274612
12 1 Jam nut 274852
13 1 Wedge 274628
14 1 Connector body 274627
15 1 Boot 274871
16 2 Connector pins 274629
17 1 Cord grip 273169
18 1 Switch and wire assembly 274637
19 2 Screw 50094
20 1 Ball 66001
21 1 Pipe plug 67359
22 1 Gasket 274626
23 1 Cover 274625
24 4 Screws 274898
25 1 Spring 55362
26 1 Pump † table below
27 1 Pipe nipple 10462
28 1 1/4 NPT pipe plug 67359
29 1 Manifold 274638
30 1 Unloader assembly 274833
31 1 Adaptor 274853
32 1 Check valve assembly 274825
33 1 Support Bracket 274772
34 2 #10-32 screw 274851
35 4 1/4 in. (6 mm)washer 274857
36 2 1/4 - 20 screw 50169
37 2 #10 flat washer 48218
38* 1 Wiring harness 274858
1) Parker 3-906 nitrile 90 durometer
* Indicates change
Pump assembly, item 26
Model Voltage Bare pump Service page section
274874 24 V DC 274873 Section C8, page 298 series
276360 12 V DC 276041 Section C8, page 323 series
10