LEURS PRECISION 91XL User manual

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MANUAL for:
UNIVERSAL SPRING COMPRESSOR 91XL (SC91XL)
Read this manual before you start to work
with the SC91XL.
SC91XL designed and made by:
LEURS PRECISION
Nijverheidsweg 11
2821 AT Stolwijk
Holland
Tel.: +31 ‒ (0)182 342 342
[e-mail]
https://www.springcompressor.nl
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INTRODUCTION
The Universal Spring Compressor 91 XL (SC91XL) is intended as a tool for the changing of main springs of
air rifles.
By using the SC91XL changing of these springs can be done safer, with much less physical force and without
damaging the rifle.
The SC91XL is suitable for almost all types of air rifles.
SAFETY
1. Read this manual carefully, before using your SC91XL.
2. Check in a safe way and in safe direction if the air rifle, of which you want to change the spring, is not
loaded and is not cocked. (See the manual of the air rifle)
3. Wear safety goggles when using the SC91XL.
4. Use no "violence" when using the SC91XL. Due to the many different air rifle constructions, you
sometimes have to try how the air rifle can fit the SC91XL. If so, do this safe.
PREPARING WORK
1. Put the SC91XL with the middle of the frame in a vice, or with a clamp on a workbench. Take care not
to damage the SC91XL, do not "compress" the SC91XL.
2. Read the air rifle manual for how to prepare the air rifle for changing the spring of the air rifle.
3. Air rifles with the end plug screwed in the cylinder (as example Weihrauch HW77 or HW85), screw out
the end plug a few turns.
USING the SC91XL
1. Place the air rifle as follows in the SC91XL (see figure 1):
- move clamp blocks (“V-blocks”) so that the SC91XL fits the rifle.
- if necessary turn the air rifle around until it fits the SC91XL.
- place stop disc (1) over the barrel, in the recess of the frame. (otherwise the rifle will shift out
of the SC91XL)
There are 3 different stop discs supplied , one with a slot of 16.5mm, one with a slot of 21mm,
and one without a slot
The stop disc without a slot can be, if necessary, adapted to an air rifle.
Pay especially attention if the adapted stop disc is still strong enough and can be
used safely as intended.
2. Clamp the air rifle in the SC91XL by putting the two clamp covers (2) over the air rifle cylinder. Tighten
the clamp covers with the four knurled nuts (3).
3. Air rifles were a safety knob protrudes out of the end of the end plug (for example Webley Eclipse)
should, for preventing damage to this knob, be put a wooden or plastic piece between the end plug
and the push block (4).

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4. If the air rifle is clamped properly in the SC91XL, put the end plug with the threaded spindle (5)
under such a (small) tension, that:
ATTENTION: Always guide mainspring and end plug with the threaded spindle (5)
until there is no more tension of the mainspring.
or, under guidance of the threaded spindle the end plug can be screwed out (for example
Weihrauch air rifles).
or, the cross pin can be pushed out, then guide the end plug and mainspring (for example
Webley-Eclipse).
or, screw out the screw at the bottom of the cylinder (with which the end plug is hold in the
cylinder), after that guide the end plug and the mainspring. (for example BSF-S60).
5. If the mainspring is not forcing anymore against the screw spindle, then take the rifle out of the
SC91XL and remove the main spring.
6. Place the (new) mainspring and end plug in the cylinder.
7. Clamp the air rifle again in the SC91XL, don't forget the stop disc (1). Then execute point 4.
in reverse way.
8. Take the air rifle out of the SC91XL, and assembly the rifle according the air rifle manual.
Check if the rifle is functioning safe and properly.
MAINTENANCE of the SC91XL
See figure 1. Keep the eye bolts (6), knurled knobs (3) and threaded spindle (5) free of dust and grease
these steel parts lightly to prevent corrosion and friction/galling.
SC91XL should be stored dry.
Before using the SC91XL check it on defects or damage which could let to unsafe situations.
GUARANTEE of the SC91XL
The SC91XL will be guaranteed against faulty workmanship and defective materials for a period of
two years from the original date of purchase.

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REPAIRING of the SC91XL
Underlined parts are assembled with a locking fluid of medium strength (for example Loctite 243). Tighten
the domed cap nuts (SC91-105) by hand, not with a spanner!!. See also figure 2.
The Allen screw (SC91-140) and the wing nut (SC91-155) are screwed on the threaded spindle (SC91-
150XL).
When ordering parts always refer to: part number/description/quantity needed.
No. Part number Description Quantity
1 SC91-010XL Universal Spring Compressor 91 XL, assembly -
2 SC91-020XL frame 1
3 SC91-040XL sticker 1
4 SC91-100XL guide rod 2
5 SC91-105 domed cap nut (DIN 1587-M12-CHROM 4
6A SC91-165 stop disc, with slot 16.5mm 1
6B SC91-210 stop disc, with slot 21mm 1
6C SC91-114 stop disc, without slot 1
7 SC91-115 clamp block 2
8 SC91-120 clamp cover 2
9 SC91-125 eye screw 4
10 SC91-130 knurled nut (DIN 466-M8-BLACK) 4
11 SC91-135 push block 1
12 SC91-140 Allen screw (DIN 912-M5x10-8.8) 1
13 SC91-145 washer (DIN125B-5,3-140HV) 1
14 SC91-150XL threaded spindle 1
15 SC91-155 wing nut 1
- SC91-200E-XL manual, English 1
- SC91-200NL-XL gebruiksaanwijzing (manual), Nederlands (Dutch) 1
SPECIFICATION
weight : 8.8 lbs (4.2 kg)
dimensions : 32.4" x 3.4" x 5.5" (822 x 86 x 140 mm)

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English manual 1 June 2020
part number manual: SC91-200E-XL