Technical Information · issue 5 of 1999
036 QS: Coasting brake
IssueTI 5/1999
Engine family 1125
Full text
Page 1 of 5
Technical Information
05.1999
036 QS Chainsaws - Series 1125
1. Rear handle brake
(separate system)
1.1 Method of Operation The STIHL Rear handle brake activating
The STIHL 036 QS chainsaw is equipped with an mechanism is integrated in the throttle trigger
additional chain braking system. interlock (rear handle). The saw chain is
As before, the chain brake is activated by the mass automatically locked in position when the rear
moment of inertia of the front hand guard in certain handle is released (e.g. when carrying the running
situations if kickback is severe enough and can also saw).
be activated manually by pushing the front hand Warning!
guard forward in the direction of the bar nose. In
To help avoid personal injury or damage during
both these cases the movement of the saw chain is
cutting it is important to note the characteristics that
stopped within a fraction of a second.
make the STIHL 036 QS different from chainsaws
In addition to these functions, the new system brings that do not have such a braking system. Before
the saw chain to a standstill in less than a second operating the 036 QS for the first time, the user
after the operator lets go of the chainsaw’s rear should make himself familiar with how the QS
handle. Similarly, the locked saw chain is not system works. Special attention should be paid to
released until the operator presses down the throttle the chapters "Chain Brake" and "Starting" in the
trigger interlock lever to operate the throttle. owner’s manual.
The saw chain can be braked in three different
ways:
Quickstop
. By the inertia of the front hand guard if the
kickback force is high enough
. Manually via the front hand guard
STIHL Rear handle brake
. Manually via the rear handle - new function
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U
)m~ge 2 Technical Information 05.1999
Operation of rear handle brake with Quickstop
brake disengaged
148TI000 KN
148TI006 KN
Brake deactivated Brake activated
. Press down the throttle trigger interlock lever . Let go of the rear handle
. Brake band releases clutch drum and allows . Rear handle brake stops chain rotation in less
saw chain to rotate than one second
Chain Lubrication
A quality chain lubricant must be used in the 036 QS
to ensure reliable operation. If a biological chain
lubricant is preferred, we recommend the use of
STIHL Bioplus. This also applies to the
maintenance of moving parts of the system (see
1.3.1). Unsuitable oils may result in premature
failure of the chain brake due a buildup of resin.
1.2 Specifications
With the execption of the machine’s weight, up from
5.7 kg to 5.8 kg (12.6 lb to 12.8 lb), the specifications
of the 036 QS are exactly the same as those of the
standard 036.
Main changes to existing components
. Strengthened chain sprocket bearing
. Ceramic coated brake band
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Technical Information 05.1999 Page 3
1.3 Repairs
If the unit is started up in the course of repairs or
maintenance work it is essential to observe all local
safety regulations and the safety precautions
outlined in the owner’s manual.
1.3.1 Service Notes
Inspections, maintenance reopairs must be
performed by properly trained and authorized
148TI007 KN
personnel.
Checking function of rear handle brake
(with bar and chain fitted)
. Activate the throttle to wide open
. Let go of the rear handle
. The saw chain must come to a standstill in less
than one second
If the brake does not function properly, the sliding
and pivot points shown in the illustrations must be
serviced as follows:
148TI008 KN
In case of slight contamination:
. Use a suitable brush and mineral spirit to clean
all parts
In both cases:
If heavily contamined or clogged with resin: P Lubricate with Mobilplex 0781 120 1111
. Disassemble the parts and clean with mineral p Coat with chain lubricant*
spirit or a resin solvent (circumference of clutch drum)
. Replace any worn or damaged parts
. Clean housing recesses before reinstalling parts
* Important:
If a biological chain lubricant is preferred, we
recommend the use of STIHL Bioplus. To ensure
correct operation, use only original STIHL
replacement parts as shown in the current parts list.
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)m~ge 4 Technical Information 05.1999
1.3.2 Tightening Torques
Self tapping (DG) screws are used in polymer
components. These screws form a permanent
thread when they are installed for the first time. They
can be removed and installed as often as necessary
without detrimentally affecting the strength of the
screwed assembly, providing the specified
tightening torque is observed. For this reason it is
essential to use a torque wrench.
Fastener Thread size For component Torque Nm (lbf.ft) Rem.
Torx M8 x 22 Brake band
mounting/crankcase 10 (7.5) 1)
All other parts as before
Use the following procedure to fit a DG screw in an existing thread:
. Position the screw in the hole and rotate it counterclockwise until it drops down slightly.
. Tighten the screw clockwise to the specified torque.
This procedure ensures that the screw engages properly in the existing thread and does not form a new
thread which would weaken the assembly.
Remarks
1) Screw must be secured with adhesive 0786 111 2101 (LOCTITE 242)
Note: Screws installed with adhesive are easier to release if the area they heated first with a hot air blower
(hair dryer). Take care not to overheat polymer components.
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Technical Information 05.1999 Page 5
1.3.3 Repair Times
The specified repair times assume that the work is Code Type of Repair 036 QS
performed by trained personnel in a properly 1 Crankcase, Crankshaft, Crank
equipped service workshop. The repair times are Bearings, Crankcase Gasket 2.3
given in tenths of an hour (0.1 = 6 minutes).
2 Cylinder Shroud 0.3
3 Anti-Vibration Buffers 0.7
Note: The repair times table for the 036 QS can be 4 Crankshaft Seals 1.0
used to supplement the STIHL repair times table 5 Cylinder and/or Piston 1.3
(either cut along the line and paste it in or transfer
6 Ignition Module 0.5
the data by hand).
7 Fule Hose 0.5
1.4 Spare Parts 8 Carb Flange or Connector 0.7
A separate illustrated parts list is available for model 9 Repair/Rebuild Carburetor 0.8
036 QS. 10 Replace Carburetor, Carburetor
Jet (if tried to repair use code 9) 0.4
11 Oil Pump, Oil Line 0.7
12 Recoil Starter 0.5
13 Clutch 0.5
14 Chain Brake 0.9
15 Muffler 0.4
16 Air Filter, Filter Cover, Tank Cap,
Tank Vent, Fuel Filter, Oil Filter,
Spark Plug, Deco Valve, Cutting
Attachment
Misc. Minor Repairs 0.3
17 Stop Switch, Control Lever 0.5
18 Fuel Tank/Handle Assy 0.8
20 All Other Repairs 0.5
✂
Last Technical Information on model 036 QS: 33.97
© 1999 Andreas STIHL AG & Co. Technical Documentation
Waiblingen D1/MTK-al 6480
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Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.