SKF FlowMaster II Instruction Manual

User and maintenance instructions
Models 85705 and 85705MSO, series “B” CAT branded
FlowMaster II rotary driven
hydraulic pump
Date of issue January 
Form number 
Version 

Explanation of
safety signals
Safety
Read and carefully observe these
installation instructions before installing,
operating or troubleshooting assembly.
Assembly must be installed, maintained and
repaired exclusively by persons
familiar with instructions.
Install assembly only after safety
instructions and this guide have been
read and are completely understood.
NOTE
Refer to manual  for all other safety
considerations.
NOTE
Emphasizes useful hints and
recommendations as well as
information to prevent property damage
and ensure efficient trouble-free
operation.
CAUTION
Indicates a dangerous situation that can
lead to light personal injury if
precautionary measures are ignored.
WARNING
Indicates a dangerous situation that
could lead to death or serious injury if
precautionary measures are ignored.
DANGER
Indicates a dangerous situation that will
lead to death or serious injury if
precautionary measures are ignored.
Contents
Explanation of safety signals. . . . . . . . 
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Description. . . . . . . . . . . . . . . . . . . . . . . 
General description. . . . . . . . . . . . . . . . . 3
Appropriate use . . . . . . . . . . . . . . . . . . . 3
System operation . . . . . . . . . . . . . . . . . 
Operation with system controller . . . . . . 3
Pump assembly . . . . . . . . . . . . . . . . . . . 
Install pump. . . . . . . . . . . . . . . . . . . . . . 
Pump operation. . . . . . . . . . . . . . . . . . . 
Fill reservoir . . . . . . . . . . . . . . . . . . . . . . 4
Maintenance and repair . . . . . . . . . . . . 
General maintenance . . . . . . . . . . . . . . . 4
In case of system malfunction . . . . . . . . 4
Outlet check inspection and repair. . . 
Vent valve service . . . . . . . . . . . . . . . . . 
Follower . . . . . . . . . . . . . . . . . . . . . . . . . 
Float switch . . . . . . . . . . . . . . . . . . . . . . 
Safety unloader valve. . . . . . . . . . . . . . 
Mechanical shut-off valve . . . . . . . . . . 
Illustrated parts breakdown . . . . . . . . 
Service parts . . . . . . . . . . . . . . . . . . . . . 
Troubleshooting . . . . . . . . . . . . . . . . . . 
Warranty . . . . . . . . . . . . . . . . . . . . . . . . 
2

Description
General description
Model 85705 is a pumping unit designed to
operate a Centro-Matic lubrication system.
Unit includes a vent valve to relieve line
pressure to recharge injectors.
FlowMaster II rotary driven hydraulic
pump includes pressure reducing valve,
flow control valve and solenoid oper-
ated (24V ) “on” and “off” valve.
FlowMaster II pump is fully automatic
when used with a controller and pressure
switch. Pump is double acting, dispensing
lubricant on both “up” and “down” strokes.
Unit is designed to be used with SL-V,
SL-V XL, SL-1, SL-11, SL-32 and SL-33
series injectors or a combination of these.
Model 85705 includes electronic
float switch.
Appropriate use
• Pump on this unit is exclusively designed
to pump and dispense lubricants using
hydraulic power only.
• Maximum specification ratings should not
be exceeded (Table ).
• Any other use not in accordance with
instructions will result in loss of claims for
warranty and liability.
WARNING
Do not exceed 3 000 psi (207 bar)
maximum supply inlet hydraulic pressure
or 3 500 psi (241 bar) maximum outlet
pressure.
Exceeding rated pressures may result in
death or serious personal injury, and damage
to system components.
Table 
Specifications
Supply inlet hydraulic pressure Max 3 000 psi (207 bar)
Operating working hydraulic pressure 400 psi (28 bar)
Maximum output pressure 3 500 psi (241 bar)
Hydraulic inlet flow Up to 3.5 gal/min (13 l/min)
Pump ratio with manifold 10:1
Ambient operating temperature –40 to +150 °F (–40 to +66 °C)
Operating voltage 24 V
Hydraulic inlet port SAE 6 ORFS
Tank return port SAE 8 ORFS
Maximum hydraulic fluid temperature 250 °F (121 °C)
Container capacity 60 lbs (27 kg)
System operation
Operation with
system controller
When system controller times out, a lubrica-
tion cycle is initiated. Solenoid is energized to
deliver hydraulic pressure to pump and vent
valve. Pump begins dispensing lubricant
through injectors to bearings.
When lubrication cycle has completed,
pressure rises in system to actuate pressure
switch. When pressure switch actuates,
control is reset to de-energize solenoid
valve, cutting off hydraulic oil pressure to
pump and vent valve. Pump stops, pressure
vents and pressure switch de-actuates.
Controller begins timing toward next
lubrication event.
3

Pump assembly
Refer to manual  for
bare pump assembly ()
(Fig. 2, page 7).
Install pump
Place unit in approximate location making
sure electric and hydraulic power connec-
tions are accessible. Mark center locations of
six holes at bottom of reservoir. Drill six
1/2in (13 mm) holes. Use of 7/16 in (10 mm)
bolts will offer some flexibility in securing
reservoir to equipment.
Lubricant outlet of pump should be con-
nected to system with suitable hose capable
of 3 500 psi (241 bar) working pressure.
Hydraulic inlet connection should be made
with at least 3/8in (9 mm) inner diameter
hose capable of at least 3500 psi (241 bar)
operating pressure. Hydraulic return to tank
connection line should be 3/4in (19 mm)
inner diameter hose or pipe.
Refer to manual  for setting
pump pressure and flow control.
Pump operation
Fill reservoir
 Remove lower pipe plugs from side of
reservoir.
 Attach appropriate bulk-filling pump to
lower inlet (1 NPT).
 Fill reservoir until grease appears at vent
high level port.
 Remove bulk filling pump.
 Replace lower plug.
Maintenance
and repair
General maintenance
• Keep area around pump clean. Clean off
filling port area prior to filling reservoir.
Clean area around filler after filling as
lubricants will attract dirt.
• Keep lubricants clean and free of dirt
and debris.
• When replacing grease pails prevent any
foreign matter from entering grease pail
or contaminating grease, as it adheres
to pump.
In case of system
malfunction
• Refer to Troubleshooting, page , to
determine cause of malfunction.
• Refer to Outlet check inspection and repair
for replacement and repair of specific
areas of check valve.
• Refer to Vent valve service, page ,for
replacement and repair of specific areas of
vent valve.
• Refer to Safety unloader valve, page
,for replacement and repair of
specific areas of safety unloader valve.
• Identification of each part is shown in
illustrated parts breakdown section
(Fig. 2, page 7) with a corresponding
number keyed to specific part.
• General recommendations of tools
required are specified in each step.
• Pay particular attention to warning
statements to prevent personal injury
and possible damage to pump
components.
WARNING
Use caution when filling reservoir.
Extreme pressure may cause death or
serious personal injury.
Outlet check
inspection and
repair
Before starting this procedure, refer to
Troubleshooting, page , to determine if
outlet check valve is cause of failure.
Pump will not build up sufficient lubricant
pressure if outlet check assembly () is
fouled. Foreign material may lodge beneath
check ball () or between pump check disc
assembly () and seat of bushing assem-
bly (). Sealing surfaces of seat must form
a perfect seal. Clean parts or replace if
pitted, worn or scored.
 Turn off and disconnect electric power
supply to pump assembly ().
 Remove hose assembly () and both
elbows () (Fig. 2, page 7).
 Remove outlet check assembly () and
adapter () by loosening adapter ()
from elbow ().
 Remove adapter () from
outlet check assembly ().
 Remove outlet connector () from
bushing () (Fig. IPB 1, page 8).
 Remove ball check seat () from
outlet connector ().
 Inspect check components (, , , )
for scoring, damage or any foreign
material that may cause internal
leakage. Replace if damage is found.
 If foreign material is present, clean
components and reassemble. Replace
gaskets (, ) whenever vent valve is
disassembled.
 Reverse above procedure to reassemble.
Torque check assembly to
100 lbf-ft (135 Nm).
4

Vent valve service
Before starting this procedure, refer to
Troubleshooting, page , to determine
if vent valve is cause of failure.
 Turn off and disconnect electric power
supply to pump assembly ().
 Loosen vent hose () and
supply hose () (Fig. 2, page 7).
 Remove screws () and
lockwashers ().
 Hold base of vent valve in vice to remove
elbows (and ). Turn vent valve in vice
so vice jaws are gripping flats machined
on base of vent valve.
 Remove hydraulic cylinder ()
(Fig. IPB 2, page 8).
 Remove piston and u-cup assembly ()
from cylinder. If oil leakage was evident
from side of hydraulic cylinder, replace
packing.
 Remove packing assembly (). If grease
leakage is evident from side of hydraulic
cylinder, replace packing assembly.
 Inspect needle () and valve seat ().
If foreign matter is lodged and keeping
needle from sealing in valve seat, clean
and inspect for damage. If seat appears
damaged by nicks, grooves or scoring it
should be replaced. Remove
valve seat () from valve body ()
by placing a 3/4in open end wrench
onto flats and loosening seat. Use of
an adjustable wrench in place of open
end wrench may be necessary due to
accessibility of seat.
 Replace valve seat () if damaged. Be
sure to remove and replace gasket ()
below seat.
 Reverse above procedure to reassemble.
Needle () and hydraulic cylinder ()
inside diameter should be coated with oil
or grease to assist in assembly.
 Upon reassembly, tighten valve seat ()
into valve body () using
25 lbf-ft (39 Nm). Tighten
hydraulic cylinder () onto valve
body () using 100 lbf-ft (135 Nm).
Follower
If follower foam appears to be damaged or
does not wipe sides of container effectively
service may be necessary.
 Disconnect hydraulic supply from pump.
 Remove hex head screws (),
lockwashers () and eyebolts () that
attach drum cover () to reservoir
assembly () (Fig. 2, page 7).
 Lift pump assembly (), vent valve ()
and drum cover () out of
reservoir assembly ().
 Remove follower assembly () from
reservoir assembly ().
 Wipe off excess grease from
follower assembly ().
 Loosen and remove eight locknuts ()
on top of follower assembly ()
(Fig. IPB 5, page 9).
 Remove weighted follower plate ()
and follower foam (). Replace foam.
 Reverse above procedure to reassemble.
Make sure long bolts are staggered with
short bolts and extend below follower.
Float switch
If float switch is not detecting proper grease
level, there are several possible reasons:
• Gauge operation
–Determine if gauge (wired to sensor
connection) is functional and wired
correctly.
• Sensor connection
–Determine if wires are securely
connected to both power supply,
gauge and sensor.
• Sensor function (Fig. IPB 3, page 8)
–Determine if sensor and components
are functioning properly as follows:
NOTE
Install elbow () facing down and rotate
approximately 30° toward vent hose to
prevent excessive rubbing of hydraulic hose
on pump.
○Is sensor body () securely
fastened to drum cover ()
(Fig. IPB , page ).
○Is sensor gasket () clamped
between sensor base and
drum cover (). If gasket is missing
or torn replace to prevent entrance of
water or contaminants into reservoir.
○Is float magnet () secured under
magnet cover ().
○Is float assembled properly with
“top” stenciled to top of float. If
float is missing, replace. If float is
upside down, invert. If bracket is
missing, replace.
○Is the wiper gasket () in place and
moving freely under wiper cover ().
If excessive grease is noticed on
sensor rod (), replace gasket.
Gasket should be able to move
approximately 1/8in (3 mm) from
center position. If gasket cannot move
freely, remove wiper cover () and
determine cause of restriction.
After all of above have been corrected and
sensor still does not indicate proper grease
level, it is defective and must be replaced.
Refer to 404394.
Safety unloader
valve
Safety unloader valve () is not serviceable
and must be replaced if malfunction is
apparent (Fig. 2, page 7). Upon
reassembly, tighten to 10 lbf-ft (13.5 Nm).
Safety unloader valve () is set to open at
4 750 to 5 250 psi (327 to 362 bar) lubricant
pressure. If pressure switch fails to operate
and shut off hydraulic supply to pump, safety
unloader valve will open at approximately
5 000 psi (345 bar) to relieve lubricant
supply line pressure (safety unloader valve
is preset and not adjustable).
5

M2
P
87
88
74 75
76
77
78
79
80
81
82
83
843)
2)
1)
1)
Mechanical
shut-off valve
Mechanical shut-off valve automatically
shuts off filling of reservoir without power
applied to system.
Shut off fill pump and relieve pressure
between fill pump and shut-off valve in
order to disconnect fill line safely.
Keep pressure relief valve activated until
supply line pressure on gauge falls below
200 psi (13 bar). Fill line can then be
removed at quick disconnect point.
Fig. 
MSO only
1) All ports are 1/2in NPTF.
2) Apply two drops of 242 Loctite, 180° apart.
3) Torque from 30 to 35 ft-lbf (41 to 47 Nm).
6

18.9 in
(479 mm)
2
15 / in (384 mm)
13 / in (352 mm)
18
78
22.5°
22.5°
29.2 in
(741 mm)
20
18
19
17
16
15
21 22
23
24
25
26
27
11
12
13
14
5
35
34
33
14
32
31
85
86
30
36
37
38
39
28
29
456
7
8
9
1
10
1
3
1
/ in (13 mm)
12
Fig. 
7

/ NPTF
46
44
45
43
42
41
13
1
4
47
48
49
50
51
52
53
38
55
54
36,
37
56
57
59
58
Fig. IPB 
Outlet check assembly ()
Fig. IPB 
Vent valve ()
Fig. IPB 
Cover plug
Fig. IPB 
Float switch ()
8

C
C
D D
60
60
61
62
63
64
65
66
67
68
69
70
70
71
72
73
D-D
C-C
Fig. IPB 
Follower assembly ()
9

Service parts
Item Description Quantity Part no. Item Description Quantity Part no.
1 Elbow, 1/4NPTF 3 277439 45 Steel ball, 3/8in 1 66001 1)
2 Adapter 1 12213 46 Outlet connector 1 90860
3 Outlet check assembly 1 81938 47 Cylinder 1 241807
4 Vent hose 1 270726 48 Piston and u-cup assembly 1 2446731) 2)
5Elbow connector, #4 ORB x #6 ORFS 1 273100 49 Needle 1 14722 1)
6Connector, #6 ORB x #8 ORFS 1 273129 50 Packing assembly 1 239330 1) 2)
7Hose assembly 1 277441 51 Valve seat 1 14723 1)
8Safety unloader valve, 5 000 psi (345 bar) 1 273067* 52 Gasket 1 31047 1)
9 Nipple, 1/4NPTF x 3/4NPTF 1 14727 53 Valve body 1 239336
10 Vent fitting 1 249354 54 Gasket 1 274540
11 Vent pipe 1 67420 55 Float magnet 1 274543
12 Nut 1 12538 56 Hex head screw, 1/2-20 x 1 in 1 50025
13 Gasket 1 31010 57 Gasket 1 31029
14 Lockwasher, 3/8in. 8 66220 58 Lockwasher, 1/2in 1 69181
15 Nut, 3/8-16, grade 5 2 51005 59 Hex nut, 1/2-20 1 51039
16 Eyebolt 2 276300 60 Socket head screw, 10-24 x 1/2in 8 50762
17 Vent elbow 1 249533 61 Magnet cover 1 279469
18 Hex head screw, 1/4-20 x 1 1/4in 4 277728 62 Wiper gasket 1 274319
19 Lockwasher, 1/4in 4 66186 63 Wiper cover 1 279468
20 Adapter elbow 1 271599 64 Follower foam 1 276894
21 Hose assembly 1 271598 65 Locknut, 1/4-20 8 51304
22 Elbow 1 20012 66 Weighted follower plate 1 276890
23 Hydraulic vent valve 1 84980 67 O-ring, nitrile 1 270720
24 Outlet elbow 1 10160 68 Wiper cover 1 274318
25 Lockwasher, 5/16 in 2 66246 69 Wiper gasket 1 274321
26 Hex head screw, 5/16-18 x 3/4in 2 50016 70 Spacer 12 241101
27 Reservoir assembly 1 276648 71 Hex head screw, 1/4-20 x 2 1/2in 4 50062
28 Extension tube 1 276853 72 Hex head screw, 1/4-20 x 4 1/2in 4 241102
29 Pipe plug, 1 NPTF 1 67346 73 Follower plate 1 276888
30 Elbow, 1 1/4NPTF 2 276854 74 Straight spring 1 55303
31 Gasket 1 249355 75 Spring housing 1 279162
32 Drum Cover 1 277399 76 Gasket, 1 in OD × 771 in ID 1 31001
Drum cover (85705MSO) 1 279553*
33 Hex head screw, 3/8-16 x 1 1/4in 6 50015 77 Spring pin 1 279165
34 Pump gasket 1 277406 78 Ball, 1/2in Gr 25 1 203207
35 Bare pump assembly 1 85707 3) 79 Pin 1 277590
36 Hex head screw, 10-24 x 5/8in 5 50088 80 Body 1 278769
37 Lockwasher, #10 5 68991 81 Gasket 1 279042
38 Float switch 1 277659 82 Lock washer 2 66246
39 Follower assembly 1 85706 83 Screws 2 50016
40 Gasket 1 31029 1) 84 Guide 1 277591
41 Outlet check bushing 1 90204 1) 2) 85 Pivot arm assembly 1 279197
42 Pump check disc assembly 1 80206 1) 2) 86 Block/guide assembly, 1/2in 1 278668
43 Ball check seat 1 10313 1) 87 U-cup seal 1 271937
44 Gasket 1 31001 1) 88 Washer 277593
1) Suggested service replacement components.
2) Sold as an assembly. Individual parts not available.
3) See manual  for pump details.
* Indicates change.
10

Troubleshooting
Condition Possible cause Corrective action
Pump does not operate. No hydraulic power to pump. Turn on or connect hydraulic supply to pump.
No pressure on gauge:
• Closed supply line shut off valve. Open shut-off valve.
• No power to solenoid valve. Correct electrical fault.
• Faulty solenoid. Replace solenoid.
• Pressure reducing valve is set too low. Reset pressure reducing valve.
• Insufficient hydraulic fluid supply. Check hydraulic supply for proper pressure and flow.
Pressure is shown on gauge on pump manifold:
• Closed fluid outlet line. Check outlet line and clear obstructions.
• Flow control valve is fully closed. Re-adjust flow control valve to one turn open.
• Pump is stalled due to grease back pressure. Check vent valve in system.
Pump is seized or damaged. Dismantle pump and repair defective or seized
component. Refer to manual .
Pump runs excessively. Pump tube malfunction. Refer to manual .
Outlet check damage or contamination. Repair check or remove contamination.
Vent valve damage or contamination. Repair vent valve or remove contamination.
System component leaking. Repair leaks.
Vent valve not receiving proper pressure to keep it closed. Orifice fitting plugged.
Injector bypassing. Repair injectors.
Pump speeds up or runs erratically. Low level of grease or reservoir is empty. Refill reservoir.
Follower plate is stuck and separated from grease. Check follower plate and container for damage.
Pump piston or checks are worn. Refer to pump manual .
Pump runs, but output is low. Insufficient hydraulic fluid supply. Check hydraulic supply and adjust flow.
Inlet pressure too low. Increase pressure at pressure control valve.
Faulty inlet or discharge check valve in pump. Replace faulty components. Refer to
pump manual .
Lubricant leaking from safety unloader
valve.
Pressure of system set too high. Adjust pressure switch setting.
Safety unloader damaged or contaminated. Replace safety unloader.
Lubricant leaking from weep hole
in vent valve.
Vent valve lubricant seal damaged. Replace lubricant seal.
Mechanical shut-off (MSO) system (MSO only)
Cannot refill reservoir through MSO. Reservoir is full. Check lubricant level.
Pressure present at port P. Vent pressure at port P using fill/vent valve
assembly (). Check gauge pressure. Pressure on
port P must be vented to reset MSO valve for filling.
Reservoir is low or empty,
but cannot fill through MSO.
Pressure present at port P. Vent pressure at port P using fill/vent valve
assembly (). Check gauge pressure. Pressure on
port P must be vented to reset MSO valve for filling.
Follower assembly is sticking in UP position. Repair or replace follower.
Straight spring () is broken or damaged. Replace straight spring () and gasket ().
MSO pin () is contaminated with dirt or debris. Clean or replace pin () and/or guide ().
Fill pump fails to stall, reservoir overfills. MSO body () or ball () is fouled with dirt or debris. Clean ball () and body ().
MSO body () or ball () is worn. Replace body () or ball ().
Pivot arm assembly () is damaged or
out of alignment with MSO pin ().
Repair or replace pivot arm assembly ().
Lubricant is leaking past follower. Repair or replace follower.
Grease found on top of follower. Follower assembly is damaged. Repair or replace follower.
MSO leaking grease through guide (). Worn or damaged U-cup seal (), and/or
copper gasket (). Replace both.
Worn or damaged pin () and items above.
11

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whether direct, indirect or consequential arising out of the use of the information contained herein.
January 2021 · Form 404581Version 3
Warranty
The instructions do not contain any information on the warranty.
This can be found in the General Conditions of Sales, available at:
www.lincolnindustrial.com/technicalservice or
www.skf.com/lubrication.