Lincoln industrial QLS 321 User manual

Lubrication System QLS 321
for Trailers/Semitrailers
4302a00
810-55251-1
Owners Manual
Installation and Operation Instructions
Form 403012 2.1B-38010-A00
Subject to modifications
Section - Q3 Page - 17

Page 2 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
Safety Instructions
Appropriate Use
 Use QLS 321 only for dispensing lubricants. QLS 321 is
designed for intermittent operation only. QLS 321 is
designed for supplying lubricant to a maxim m of 18 l be
points per cycle.
General Safety Instr ctions
 Lubrication systems QLS 321
- are state of the art
- can be assembled for safe operation.
 Refill QLS 321 ith clean lubricant.
 Do not over pressurize reservoir hen filling the pump.
 Each outlet needed must be equipped ith an
appropriate check valve.
Important: Do not paint pump. Before painting a commercial
vehicle make sure to either remove or completely cover the
pump.
 Unauthorized modifications or changes to an installed
system are not recommended and ill void arranty. Any
modifications must be subject to prior consultation ith the
manufacturer of the lubrication system or the
manufacturers contract partner.
Reg lations for prevention of accidents
 To prevent accidents, observe all city, state and federal
safety regulation of the country in hich the product ill be
used.
Operation, Maintenance and Repair
 Repairs should only be performed by authorized
personnel ho are familiar ith the instructions.
 QLS 321 operates automatically. Ho ever, a regular check
(approx. every 2 eeks) should be made to ensure that
lubricant is being dispensed from all lube points.
 Used or contaminated lubricants must be disposed of in
accordance ith local environmental regulations, see
technical data sheets of lubricants used.
 The manufacturer of the centralized lubrication system ill
not accept any liability for
- damage caused by insufficient lubricant and irregular
refilling of pump
- damage caused by inadequate or only conditionally
pumpable lubricants
- damage due to the use of contaminated lubricants.
- damage caused by the inadequate disposal of used or
contaminated lubricants.
- damage caused by unauthorized modification of system
components.
- damage caused by the use of unapproved parts (voids the
pump arranty).
Table of Contents
 QLS 321 must only operate ith mounted or connected
SSV divider blocks.
 QLS 321 must be regularly refilled ith clean lubricant.
Safety Instr ctions ........................................................ 2
Installation Instr ctions ............................................... 3
Pump .............................................................................. 3
SSV Divider Block ............................................................ 3
Crossporting of the SSV Divider Block ........................... 3
Check valves .................................................................... 4
Feedback of supplied lubricant ....................................... 4
Lubrication point .............................................................. 4
Installing Quicklinc-tube fittings ...................................... 4
Installing Zerk-Locks onto grease fittings ....................... 4
Connecting feed lines ...................................................... 5
Filling of reservoir ...................................................... 5
QLS 321 selection guide ................................................. 6
Electrical Connection Diagrams ..................................... 7
Description of QLS 321 ................................................ 7
Operating of QLS 321 ................................................... 8
Flexible time of availability - operating time ................... 9
Flexible time of availability ........................................ 9
Operating time ......................................................... 10
Pressure relief valve ...................................................... 10
Display indo of the key pad ..................................... 10
Lo -level control ............................................................. 11
Malfunction ..................................................................... 12
Setting and Operation of the QLS 321 ..................... 13
Display mode ................................................................. 13
Operating mode ............................................................. 14
Programming mode ....................................................... 16
Maintenance, Repair and Tests ................................. 17
Maintenance .................................................................. 17
Refilling of reservoir ................................................. 17
Repair 17
Functional test ................................................................ 17
Tro bleshooting .......................................................... 18
Technical Data .............................................................. 21
Dimensions .................................................................... 22
Option for metrical fittings ............................................. 23
Service parts of the QLS 321 ..................................... 24
Manufacturers declaration ........................................... 26
Explanation of symbols:
 = explanation
* = describes an action
- = listing ithin a section

Subject to modifications
Page 3 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
Installation
 Do not remove, modify or alter any safety equipment
already installed on the vehicle.
 QLS 321 must be kept a ay from sources of heat. (See
Operating Temperature Specification).
 Use only original QLS 321 service parts (see Service Parts
of the QLS 321) or parts approved by LINCOLN.
 Adhere to:
- the installation instructions of the vehicle manufacturer as
regards all drilling and elding procedures,
- the specified minimum distances bet een the bore holes
and the upper/lo er rim of the frame or bet een t o bore
holes.
 Keep feed lines to each lube point as short as possible.
 Provide access to fill, clean and visually monitor the pump
operation.
Installation Instructions
Pump
 Use drilling template to mark and drill mounting holes of the
QLS 321. Drilling template and mounting bolts are included
in the package of the QLS 321.
SSV Divider Block Crossporting of the SSV divider blocks
 The single output is the quantity of lubricant supplied to a
lube point by a piston per stroke and per outlet borehole. It
amo nts to approx. 0.2 cm³.
 By closing outlet boreholes ith closure plugs (also part of
the package) the amount of lubricant for a particular outlet
can be increased.
 Lubricant from a plugged outlet is redirected to the next
outlet on the same side of the SSV divider block in descen-
ding numerical order.
 For instance, plugging outlets 5 and 3 ill triple the amount
of lubricant at outlet 1.
 Unneeded lubricant quantities can be returned to the
reservoir, see Return of Lubricant Quantities.
Fig. 1 - Singe, double and triple lubricant output
* Install a closure plug in each outlet borehole hich is not
required (see fig. 1 or 4).
Fig. 2 - Closure plug, provided in the accessory kits
1014b00
4163a98
x - Outlet quantity (single, double, etc.)
1...6 Outlet numbers C - Grease enclosed
A - Clamping ring (brass) - eturn
B - Grease supply

Page 4 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
Check valves
* Install one complete check valve in each outlet borehole
hich ill be used.
 For pressure plastic tubes (ø 6x1.5 mm; 1/ 4 in.) use check
valves ith standard collar and knurled flange.
Ret rn of l bricant
 QLS 321 ith back mo nted SSV divider block (vertical
outlets) have the capability to internally feed back
unneeded lubricant directly from the divider block to the
reservoir.
 This happens automatically if o tlet 2 is closed ith a
closure plug (fig. 4). Lubricant quantities from even and
odd o tlets can be fed back to the reservoir by
combining the o tlets 1 and 2.
 To feed back lubricant, al ays start ith the lo est outlet
numbers, for instance, 2, 4, 6... or 1, 3, 5 ... pl s o tlet 2.
Fig. 4 sho s ho the lubricant quantities of outlets 1, 2 and
4 (3xR) return to the reservoir.
 The remaining outlets are to be used for the connection to
the lube point or to increase the lubricant quantity (double
or triple).
Maximum of internally combinable outlets:
SSV 6 = 3
SSV 12 = 6
SSV 18 = 9
Important: If o tlet 2 is connected to a l be point, then o tlet
1 m st not be closed (see fig. 1).
Fig. - Internal return of supplied lubricant on back-mounted SSV divider blocks
Installing Zerk-Locks onto grease fittings
(for inch size accessory kits only)
 The Zerk-Lock fitting consists of the Zerk-Lock body, insert
and a Quicklinc fitting.
* Place the Zerk-Lock body onto the grease fitting.
* Use a staking tool (part of the accessory kit) and a hammer
to push in the Zerk-Lock insert until the grease fitting is
tightly enclosed by the insert.
Fig. 6 - Installation of Zerk-Lock body
with staking tool
Fig. 5 - Place the Zerk-Lock body
over the grease fitting
4180a99
Fig. 3 - Check valve, push-in type
4188b99
4200a99 4201a99
L be points
x - outlet quantity (single, double, etc)
1...6 outlet numbers C - lubricant enclosed
A - clamping ring (brass) - return line borehole
B - lubricant supply
Installing Q icklinc fittings into l be points
(for metric size accessory kits only)
* Remove lube fittings from lube points and install
appropriate Quicklinc fittings into the bore holes of the lube
points.

Subject to modifications
Page 5 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
4202a99
* Scre the Quicklinc fitting into the Zerk-Lock body and
tighten until parts resist further tightening, (about 1 1/ 2
turns).
Note: Quicklinc hex. is 12 mm. Zerk-Lock body hex. is 1/2.
* Move the Zerk-Lock and tube fitting from side to side on the
grease fitting to insure the Zerk-Lock is firmly seated on the
fitting.
Fig. 7 - Screwing Quicklinc fitting into the Zerk-Lock body
Connection of Feed Lines
* Measure, cut and route the feedlines included in the kit.
Note: Avoid sh rp bends of the pl stic tubing nd the moving
p rts of the m chine th t could d m ge the lubric tion lines.
Minimum bending r dius is 50 mm (2in).
* Secure the lubrication lines using nylon ties or corrugated
tube provided in the accessory kit.
* If the lines are not primed, prime all lubrication feed lines
before connecting them to the lube point (by means of a
filling pump, a manual pump or by triggering additional
lubrications).
* Connect feed lines to the check valves of the divider block
and to the Quicklinc fittings of the lube point.
Note: Push the end of the line firmly into the Quicklinc fitting
until it is fully se ted in the body. The primed feed lines re
m rked with white lines (fig. 8, 9) s n inst ll tion id.
* Cut the feed line off at one of the hite lines before it is
mounted.
* Then insert the feed line into the fitting up to the next hite
mark.
 This ill ensure a correct installation of the feed line in the
tube fitting.
Fig. 9 - Feed line insert into the Quicklinc fitting up to the next white mark
Fig. 8 - Connect feed line to the Quicklinc fitting
4203a99
4157a98
Filling of reservoir
* Fill the reservoir ith clean suitable lubricant.
Ca tion: When filling the reservoir avoid air pockets in the lub-
ricant. Make sure that the follo er plate seal moves above the
vent hole to ensure that all air pockets are vented (see fig.11).
Ca tion: When filling the reservoir make sure that the
maxim m marking will not be exceeded. When overfilling
the reservoir this might b rst!
4204a99
Fig. 10 - Vent hole on reservoir

Page 6 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
QLS 321 Selection Guide
P mp models P32131210531
Examples of part numbers P32191410531
P321 61410531
P mp
For grease..........................................P321
SSV Divider Block
None.............................................................0
SSV 6.............................................................3
SSV 12...........................................................6
SSV 18...........................................................9
SSV Divider Block Position
None.............................................................0
Back.............................................................1
Operating Voltage
12 VDC..........................................................2
24 VDC..........................................................4
Reservoir Low-level Control
1 l reservoir with low-level control.............1
Dry Contacts
None......................................................................0
Type of Plug Connector
Scart plug (quarter-turn type)................................5
Electrical Connectors
With socket, with cable, 6 m .................................3
Control p.c.b.
With flexible time of availability and operating time ..1
Example of an explained model n mber
Pump model P32131410531- Grease pump, SSV 6 block mounted on the back, 24 VDC, ith lo -level control and ithout
dry contact, ith scart plug, socket and 6 m cable, control p.c.b.
* Note: 1. Pumps are equipped with scart plug and connection cable of 6 m length (only connection type 3)
Accessory Kits:
Inch Size Kits: Metric Size Kits:
SSV 6/8 part n°. 550-36971-1 SSV 6/8 part n°. 550-36970-1***
SSV 12 part n°. 550-36971-2 SSV 12 part n°. 550-36970-2***
SSV 18 part n°. 550-36971-3 SSV 18 part n°. 550-36970-3***
***Lube fittings must be ordered separately.

Subject to modifications
Page 7 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
Electrical Connecting Diagram
Electrical Connection
Warning: Before commissioning make sure
that the electrical s pply is off. The de-
vice may not be connected or discon-
nected when the power is on.
* Connect the electrical ires according to the follo ing
electrical connecting diagram.
Note: The protection IP6K9K is gu r nteed when the socket is
tightened.
Direct C rrent (VDC)
4276a00
Fig. 11 - Electrical Connecting Diagram, direct current
Description of QLS 321
4286a00
1 - Control pin 3 - Nipple for external manual
2 - SSV divider block lubrication
Fig. 12 _ QLS 321 with back position of the SSV divider block
The QLS321 is a compact centralized lubrication system for
providing a maxim m of 18 l be points on trailers and
semitrailers ith lubricant.
 The QLS 321 is available in the follo ing basic
configurations:
- SSV divider block mounted on the back (see fig. 12)
- Pump ithout the SSV divider block attached (no fig.).
 The standard lubrication line to be used is high pressure
plastic tubing (ø 6x1.5 mm; 1/4 in.) included in the
accessory kit.
Note: The oper tion of the QLS 321 is independent of the
mounting position of the SSV divider block.
 When braking, a signal from the control p.c.b. starts the
electrical motor and the pumping element starts pumping
the lubricant to the SSV divider blocks and to the lube
points.
 As soon as the flexible time of availability has finished and
all lube points have received lubricant, one lubrication cycle
is completed.

Page 8 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
peration of the QLS 321
P mp
Fig. 13 - QLS 321 unit
4205a00
 The QLS 321 operates according to lube cycles (flexible
time of availability and operating time).
 The first braking starts the flexible time of availability as ell
as the operating time.
 A division of the lube points (option) via secondary metering
devices (SSV 6) and one main divider block (SSV 6) is
possible only p to a maxim m of 18 l be points per
l be cycle.
 Most of the times, trailers and semitrailers do not
dispose of a permanent po er supply. The stop light
voltage provides the po er supply (terminal 54). Further,
trailers and semitrailers lack the operation dependent
signal of terminal 15 (ignition voltage) hich exists for
trucks.
1062a95
1 - Low-level control 2 - Control pin
3 - Keypad 4 - Control unit
5 - Pump 6 - SSV 6, 8, 12, 18
Fig. 1 - Stop light voltage
 In the control p.c.b., this task is provided by an integrated
motion sensor 1 (fig. 15). It records travelling motions of the
trailer/ semitrailer. Out of this recorded material, it forms the
necessary operation dependent signal for controlling the
time of availability.
 Normally, the stop light voltage lasts for a short instance
only. Therefore, a condensator is needed to record the
times (see fig. 15). On the braking process, the
condensator loads and is then available as a continuous
po er supply in order to provide the operation dependent
signal.
Fig. 15 - Control p.c.b. 236-10028-1
4303a00
1 - Motion sensor
2 - Condensator

Subject to modifications
Page 9 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
Time of Availability
Time of Availability - perating Time
Time Seq ence Diagram
1063a95
Fig. 16 -Time sequence diagram
1 - Time of availability (2 cycles shown)
2 - Braking time sequence
3 - Operating time sequence
T - Time of availability, flexibly adjustable
T1...TX - Individual travelling times
TB1...TBX - Individual braking times
A - Preset operating time
TA1...TAX - Individual operating times
P - Pause time
 The time during hich the printed circuit board records the
travelling motions by means of the motion sensor 1 (fig. 15)
is defined as the time of availability.
 The time of availability T (fig. 16) starts ith the operating
time (A), i.e. the QLS 321 is prepared to turn individual
braking operations (TB1...TBX) into lubrication cycles
(TA1...TAX, operating times) until the preset operating time
(A) elapses.
 As soon as the vehicle starts travelling, the motion sensor
starts the time of availability (T1 ..TX).
 Each time the vehicle stops, the time of availability also
stops. The electronic unit records the times hich have
elapsed so far (T1...TX).
 When the vehicle moves again, the time of availability
continues to run from the point here it had been interrup-
ted hen the vehicle stopped.
 The travelling times are stored until the preset time of
availability is reached.
 The layout of the control unit is such that during the preset
time of availabilty (T, pure travelling time) one operating
time (A) elapses.
 Once the time of availability (T) has elabsed, a ne cycle
begins.
 The time of availability (T) can be modified and is
adjustable on the key pad from 1, 2, 3...up to 16 hours
(increment 1 hour).

Page 10 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
Press re Relief Valve
Fig. 17-Pressure relief valve (cartridge) in housing
 The QLS 321 is protected ith a pressure relief valve.
 The pressure relief valve limits the pressure build-up in the
QLS 321 and opens at an overpressure of 205 bar.
 If the pressure relief valve is actuated, this indicates that
the system is malfunctioning. The lubricant flo s back into
the reservoir (hardly visible).
 If this is the case, trigger an additional lubrication and
observe the control pin on the divider block (fig. 12). If the
control pin does not move, either the system is blocked or
the reservoir is empty, see fault indication LL on the
display.
Note: To trigger n ddition l lubric tion, connect the tr iler to
the truck, connect the driving switch nd ctu te the br ke so
th t the stop light of the tr iler will fl sh.
Display Window on the Key Pad
Fig. 19 - Green rotating display, operating time
 Pump operation is indicated on the display indo of the
key pad by a rotating green light movement.
4304a00
4209a99
 All settings (programmings) are effected via the key pad (2
key buttons) on the front side of the QLS 321, also see
under Setting and Operation of the QLS 321.
 The operating conditions are indicated via an LED display
of seven segments (alphanumerically). The display is
visible through a indo in the key pad.
 The reservoir of the 321 is equipped ith a lo -level
control, hich indicates an LL on the display.
 During each actuation of the brake here no operating time
takes place the display is tested, i.e. all segments and
decimal points flash for 2 seconds, see Display mode.
Operating Time
 The operating time stands for the run time of the QLS 321
hereby the motor of the QLS 321 is s itched on.
 The operating time elapses during the time of availability.
When braking, the voltage of the stop light (terminal 54)
provides the motor of the QLS 321 ith po er. The motor
then runs during the braking process.
 The operating time (TA1, fig. 16) starts ith the first braking
actuation (TB1 = TA1, etc.).
 The electronic unit records the duration of each braking
operation (operating time) hich is added to the
 The operating time
- depends on the lubricant requirement;
- is adjustable.
 The longer the operating time, the greater the lubricant
requirement and vice-versa.
preceding one until the preset operating time (A) is rea-
ched.
 After each further braking (example: TB 4) there is no more
operation time until the time of availability (T) is completed
and starts again.
 The operating time (T) may be preset from 1, 2, 3... up to
32 minutes (increment 1 minute) on the key pad.
Fig. 18 - Key pad with display of a fault indication
4228b00

Subject to modifications
Page 11 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
Fig. 20 - Green segment, time of availability
 During each braking process here no operation time
elapses, first of all, the display ill be tested and all seg-
ments and decimal points flash for 2 seconds. Then, the
segment on the bottom of the right side of the display
indo (On) flashes during one braking process (flexible
time of availability.
 Can be initiated at any time, provided that the po er supply
(stop light) is applied, i.e. the trailer is connected to the
truck, the driving s itch is s itched on and the brake is
actuated.
* Additional lubrication:
- is initiated via the button (fig. 21). Press the button for more
than 2 seconds. Then, the rotating segment (fig. 19)
becomes visible on the key pad.
- can be initiated at any time.
Fig. 21 - Pushbutton for additional lubrication cycle
4279a00
Low-level control
Fig. 22 - Display of a low-level indication, flashing display
 If the reservoir is empty, a flashing fault indication * LL * ill
appear on the display of the key pad. Ho ever, therefore,
the po er supply (stop light) must be applied on the QLS
321.
 The follo er plate 3 (fig. 23) of the reservoir moves the pin
2 ith the magnet 1 ahead of the control p.c.b. and, thus,
initiates the lo -level signal.
 In case of a lo -level indication, the pump completes the
current lube cycle (operating time). Then, no other lubricati-
on process ill be initiated.
 Only after refilling the lubricant reservoir the pump is
automatically prepared for operation again and the flashing
lo -level signal  LL  ill be cancelled.
4229a99
Fig. 23 -Components of the low-level control
1 - Magnet 3 - Follower plate
2 - Pin
Initiate additional l be cycle
4222a99
³ 2 sec

Page 12 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
Malfunction
4286a00
Fig. 2 - QLS 321 without proximity switch, movement of the control pin
1 - Control pin 3 - Nipple for additional
2 - SSV divider block lubrication
 Possible visible malfunctions:
Either pump is defective, po er supply is interrupted, the
secondary system is blocked or there is a lo -level indicati-
on in the reservoir.
 The display of the key pad sho s hether the pump is
defective or the po er supply is interrupted.
 A malfunction of the secondary system is visible on the
control pin 1 (fig. 24). If during the operating time the
control pin does not move to the left and right, this indicates
a malfunction. In this case, the pump of the QLS 321 does
not return the grease visibly via the pressure relief valve
(fig. 20) back to the reservoir.
Note: The point of time of the movement of the control pin de-
pends on the size of the tt ched divider block. It m y t ke
some time (m x. 3 min) until the pump h s supplied the lubri-
c nt qu ntity needed for the control pin to move.
 For examination purposes, initiate an additional
lubrication and observe the movement of the control pin.
 In case of a lo -level indiation, * LL* ill flash on the
display of the key pad, see Lo -level control.

Subject to modifications
Page 13 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
 As soon as voltage is applied to the pump of the QLS
321, the key pad is automatically in  display mode.
The right-hand segment is illuminated in the display.
 Normally, the display is dark. Only the functions
(segment, rotating segment display) or lo -level signals
(LL) flash on the display.
 Display mode
- The user receives information on functions and
malfunctions of the QLS 321.
- A test display is made hen the voltage (stop light) is
applied, all segments and decimal points flash for 2
seconds.
Note: If *EP* is displayed after the display test, this
indicates that a button or the key pad is defective.
- The right-hand segment (On) indicates the available
voltage supply during the flexible time of availability. As
soon as another message is displayed, the segment turns
off.
- The operating time is displayed as a rotating segment.
-* LL* is sho n to indicate lo -level. After refilling the
reservoir, the signal turns off again.
Setting and operation of the QLS 321
 Three possible modes of operation and settings can be
selected on the key pad:
- Display mode
- Operating mode
- Programming mode
Display mode
Fig. 25 - Key pad in display mode
4288a00
4207a99 4227a99
4279a00
4209a99
4211a99

Page 14 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
perating mode
Important: The operating mode is accessible only during the
time of availability. It cannot be operated during the pump
operating time.
 Precondition: Trailer connected, driving s itch s itched
on, brake actuated, po er supply (stop light) applied.
Segment (On/h) on the right bottom side flashes.
Operating option: Initiating an additional l be cycle
*Press the button to reset the elapsed time of availability.
The operating time starts. A rotating segment is visible on
the display during the hole operating time.
Operating option: Information on preset time of
availability and remaining time of availability
Example:
Pi = 04 min Pb = 12 h rb = 10 h 09 min
Press button.
Note: The following displ y sequences re shown twice nd
re c ncelled fter 60 seconds. The ch nge of displ y occurs
every two seconds. Ex mple:
 Pi  (preset operating time)
.04 (minutes)
 Pb  (preset time of availability)
12 . (hours)
 rb  (remaining time of availability)
10 . (hours)
. 09 (minutes)
Display Press
after 2 sec.
after 2 sec.
after 2 sec.
after 2 sec.
Fig. 26 - Display in operating mode
³ 2 sec
4279a00
4209a99 4222a99
4208a99
³ 2 sec 4214a99
4299a00
4216a99
4283a00
4284a00
4285a00
after 2 sec.
4301a00
4282a00
after2 sec.

Subject to modifications
Page 15 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
after 2 sec.
perating mode, continuation
Appears after the second sequence.
4277a00
AC - Counting of automatically initiated lube cycles.
Up to 9999 cycles countable. Then, counting starts from the
beginning again.
Example: 0625 cycles
Display for hundreds and thousands
after 2 sec.
after 2 sec.
4281a00
06 - as 600
Display for tens and units.
25
after 2 sec.
UC - Counting of manually (User) initiated additional lube cy-
cles. Up to 9999 cycles countable. Then, counting starts from
the beginning again.
Example: 0110 cycles
Display for thousands and hundreds.
4280a00
4278a00
4297a00
after 2 sec.
after 2 sec.
01 - as 100
Display for tens and units.
10
4226a99
after 60 sec.
Display Press
Fig. 27 - Display in operating mode

Page 16 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
Programming mode
* To access to the programming mode, press both buttons
at the same time > 4 seconds.
Programming options - Pa se time:
P1(time of availability) 0 - 16 hours
P2 (operating time) 0 - 32 minutes
Setting of time of availability P1
* Settings are made in one direction only: 1, 2, 3,....16 h
Button pressed once .............increases by 1 hour
Button pressed continuously.....................quick sequence
 The field hour is indicated by a decimal point on the
right-hand side for the ho rs.
Setting of operating time P2
* Settings are made in one direction only:1, 2, 3,....32 min
Button pressed once .............increases by 1 minute
Button pressed continuously.....................quick sequence
 The field minute is indicated by a decimal point on the
left-hand side for the min tes.
Completing the programming:
* Press button.  P - is displayed.
 The completion of the programming is effected by
pressing the button sho n on the left side (additional lube
cycle).
Note: If the button for the ddition l lube cycle is not
pressed within 30 seconds, the previous progr mming
rem ins v lid.
Important: After completing the programming, examine the
settings of the time of availability and of the operating time in
the display mode (see page 14) again.
Displa Press Press
Fig. 28 - Display in the programming mode
³ 4 sec
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Subject to modifications
Page 17 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
Maintenance, Repair and Tests
Maintenance
 Maintenance is essentially limited to refilling the reservoir
ith appropriate clean lubricant as necessary. Ho ever,
check regularly hether the lubricant is being dispensed to
all the lube points (initiate additional lubrication).
Also check the high-pressure plastic hoses and pressure
plastic tubes for damage and replace them, if necessary.
Note: Whenever work is performed on the centr lized lubric ti-
on system, speci l ttention should be p id to
cle nliness. Dirt in the system c uses f ilures nd d m ges!
Important: To clean the system use petroleum spirit or petrole-
um. Do not se Tri, Per or similar solvents or polar or orga-
nic solvents s ch as alcohol, methanol, acetone, etc.
To fill reservoir
Fill the reservoir up to the Max. mark via the filling nipple 1
(fig. 34).
Important: The grease must be free from inpurities and must
not be liable to change its consistency over the course of time.
Note: If the reservoir h s been completely emptied, the pump
must be refilled g in nd m y require longer running time to
re ch the full lubric nt output. Therefore, initi te ddition l lube
cycles m nu lly.
Fig. 29 - Rill reservoir up to Max. marking.
1 - Filling nipple 3 - Follower plate
2 - Vent holes
Repair
 For repair ork on the QLS 321 use only LINCOLN Indu-
strial original spare parts.
 Using non-Lincoln Industrial parts ill void the pump
arranty.
Ca tion: When operating the drive motor of the QLS 321
ithout the reservoir installed, there is an ac te risk of inj ry
(br ise) by the eccentric gear on the housing.
Functional Test
illing of the empty reservoir
 When refilling the empty reservoir, make sure that all air is
being expelled from under the follo er plate 3 as described
in the follo ing.
* As soon as the follo er plate 3 reaches the upper filling
position, its sealing lip clears the upper vent hole 2 on the
inner side all of the reservoir. Then, a small amount of
grease should be expelled to ensure expelling of air from
under the follo er plate.
* Press push button > 2 sec to
initiate an additional lube cycle.
Can be initiated at any time,
provided that the po er supply
(stop light) is applied, i.e. the
trailer is connected to the truck,
the driving s itch is s itched on
and the brake is actuated.
 Observe the movement of the
control pin on the lubricant
dividier block (see fig. 12).
Fig. 30 - Push button for
additional lube cycle
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³ 2 sec
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Ca tion: When filling reservoir
especially by means of p mp with
a large o tp t capacity, do not
exceed max. filling mark. Risk of
b rsting if the reservoir is
overfilled.

Page 18 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
Troubleshooting
P mp of the QLS 321 system
 Fa lt: P mp motor doesnt r n
 Ca se:
Po er supply interrupted. Green decimal point On/h on
display is not lit.
*Check the voltage supply from the stop light to the pump.
If necessary, eliminate the fault or replace the fuses.
* Check the feed line to the fuses to the plug of the pump
and then to the printed circuit board.
*Initiate an additional lube cycle. Check voltage supply
from the printed circuit board to the motor. If necessary,
replace motor.
* Replace printed circuit board.
**EP* display ill flash. Replace housing ith key pad.
 Remedy:
Po er supply from printed circuit boeard to motor inter-
rupted. Electric motor defective.
 Printed circuit board defective.
 Key pad or button defective.
 Fa lt: P mp does not deliver l bricant
 Ca se:
Reservoir empty. * LL* display at the key pad is flashing.
 Pump does not dispense lubricant and the control pin on
the SSV divider block does not move.
Air pockets in lubricant.
Improper lubricant has been used.
Suction hole of pump element clogged.
Pump piston is orn.
Check valve in pump element defective or clogged.
 Other damages.
 Remedy:
* Fill up the reservoir ith clean grease. Let the pump run
(initiate an additional lube cycle) until the lubricant sho s
at all lube points.
Note: Dependent on the mbient temper ture nd/ or sort of
lubric nt the pump element needs longer run time to re ch
the full output c p city. Therefore, initi te sever l ddition l
lube cycles.
*Trigger several additional lube cycles. Lubricant must
dispense ithout air bubbles.
*Change the lubricant. Request for lubricant table.
*Remove pump element. Check suction hole for foreign
particles. If there are any, remove them.
*Replace pump element.
*Replace or clean pump element.
 Return pump to factory for maintenance.
 The rotating light segment on the display of the key pad
indicates that the pump operates properly.
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Subject to modifications
Page 19 of 262.1B-38010-A00
Form 403012
Owner Manual
Installation and Operation Instructions
Divider Block of the QLS 301
 Fa lt: Blockage in the downstream progressive system
Ca se:
 Bearings, lines or divider block clogged
 Mounting position of divider block: back-side
-In the case of the divider blocks SSV 6, SSV 12 or SSV
18 the outlet 1 is closed and 2 is connected.
The fault can be identified as follo s:
The indicator pin mounted on the divider block piston
does not move.
 Remedy:
 Determine the cause of the blockage as described in the
follo ing example and eliminate it.
* Let the pump run (refer to Initiating an additional lube
cycle)
* Disconnect all feed lines D (fig. 31) of the divider block
one after the other. If grease or oil sho s under pressure,
i.e. at outlet 3 of the divider block, the blockage is located
in the line of outlet 3 or in the connected bearing point.
* Pump through the blocked line or bearing point using a
hand pump.
Note: To check the individu l outlets, le ve ll outlet s
disconnected for while, since only one piston stroke is
executed with e ch motor revolution. Sever l strokes re
required for full cycle of ll divider blocks.
* Check pressure relief valve (fig. 17). Replace it, if
necessary.
A - Pressure relief valve C - SSV 12 divider block
B - Pump D - Feed lines
Fig. 31 - Example of a QLS 321
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Troubleshooting, continuation

Page 20 of 26
Owner Manual
Installation and Operation Instructions
Subject to modifications
2.1B-38010-A00 Form 403012
 Divider valve is blocked. *Replace the divider block or clean it as follo s:
*Remove all threaded tube fittings.
*Unscre piston closure plugs.
*Remove the piston, if possible, ith a soft mandrel
(smaller than ø 6 mm, 0.24 in.).
Important: The pistons are individually fitted in the bore ho-
les of the divider block. After removing the pistons, mark them
in order to reinstall them in the right direction and position.
They may not be interchanged.
*Thoroughly clean the divider block body in a grease-
solving detergent and dry it out ith compressed air.
*Clean through the material passages (ø 1.5 mm, 0.59 in.)
at the thread ends of the piston bore holes by using a pin.
*Clean the divider block once more and dry it thoroughly.
*Reassemble the divider block.
Fa lt: Differing l bricant amo nts at the l be points.
 Ca se:
Lubricant metering not correct.
Setting of the time of availability incorrect.
 Remedy:
Check the lubricant metering acc. to the lubrication chart.
 Check, adopt and optimize time setting acc. to the require-
ments.
 Fa lt: Blockage in the downstream progressive system, contin ation
Ca se:  Remedy: