Technical Information · issue 17 of 2005

New STIHL SP Special Harvester

IssueTI 17/2005

Full text

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STIH)

Technical Information 17.2005

New STIHL SP Special Harvester – Series 4231

Contents
1. Technical Description
2. Specifications
3. Approved Basic Power Tools
4. Mounting the Attachment
5. User Instructions
6. Accessories
7. Repairs
8. Spare Parts

The new STIHL SP special harvester attachment is
the latest addition to the line of special harvesters
and attachments.
It enables a brushcutter, for example, to be
converted into a special harvester.
The new tool features a new type of drive and rakes
to shake the branches.
The new special harvester is suitable for harvesting
olives, nuts, etc. It should not be used for harvesting
fruit intended for the table, e.g. cherries, plums,
apples and pears.
The new STIHL SP has been designed primarily for
private occasional users, small farmers and part-
time farmers.

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)m~ge 2 Technical Information 17.2005

Thanks to its low weight – see “Specifications” – and 2.3 Gearhead
a handle hose that can be moved along the power
Gear ratio: 1:2.5
tool’s drive tube, this special harvester is particularly
Stroke (forkhead) 4 mm
easy to handle: This helps reduce physical effort.
No. of strokes 1) 8,000/min at 10,000 rpm
Lubricant: STIHL gear lubricant for
hedge trimmers
Initial filling: 28 g
1. Technical Description Refill: up to 5 g
1)
The attachment’s gearhead and rakes are new The movement of a rake in one direction is a
developments. stroke. The to and fro movement of a rake
counts as two strokes (= 2 working strokes).
The gearhead generates the oscillating motion of
the rakes and is mounted on the end of the drive
tube so that it is required to move a relatively low
mass.
3. Approved Basic Power Tools
The STIHL SP attachment is approved for use with
the following STIHL basic power tools only:
2. Specifications Series 4137* Series 4180
1)2)
2.1 Weight STIHL FS 85 STIHL FS 100 1)2)
STIHL HL 75 3) STIHL HL 100 3)
Complete SP attachment 1.3 kg
STIHL HL 75 K 3) STIHL HL 100 K 3)
SP attachment mounted to FS 85 R STIHL HT 70 3) STIHL HT 100 3)4)
(dry tank) 5.4 kg STIHL FH 75 2)
STIHL KW 85 2)
* Important for power tools with 4137 engine:
2.2 Length The attachment may be mounted to the power
tools listed above only if the powerhead is
Complete SP attachment 390 mm
equipped with the latest clutch shoe retainers
(1127 162 3000), see 4.1.
SP attachment mounted to 1) No approved for use on machines with a bike
FS 85 R 2050 mm
handle.
2) The handle hose supplied with the STIHL SP
can be used.
3) The handle hose supplied with the STIHL SP

cannot be used. Use power tool’s handle hose.
4)
Approved only for machines with a rigid shaft in
the drive tube.
No other combinations of basic power tool and
atttachment are permitted because of the risk of
accidents and injuries.

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Technical Information 17.2005 Page 3

4. Mounting the Attachment 4.2 General Notes
The following instructions refer to mounting the
4.1 Replacing the Retainers (only on STIHL SP to an FS 85 R brushcutter.
machines with a Series 4137 powerhead)
There is no loop handle on HT basic power tools
(4.5 and 4.6).
The handle hose included with the SP cannot be
fitted on HL basic power tools becuase they are
already equipped with a handle hose (4.7).

4.3 Vibration Data
Basic power tool: FS 85 R
Attachment: Rakes

Left: Previous clutch Vibration Measurement
Top right: Previous retainer 1121 162 3000 according to EN ISO 11680-1 1)2)
Bottom right: New retainer 1127 162 3000
Left handle: 6.2 m/s2)
The clutch shoe retainers must be replaced on basic Right handle: 10.2 m/s2)
power tools with serial numbers that are lower than 1)
Vibration data are measured at idling and rated
those listed below: maximum speed in a ratio of 1:6.
2)
Serial No. 1 62 850 000 For further data on compliance with Vibration
Directive 2002/44/EC see www.stihl.com/vib/.
Serial No. 2 63 970 000
Serial No. 3 60 420 000 A warning label with this symbol is
Service manuals for STIHL FS 75, 80, 85, FC 75, attached to the machine to indicate that
HL 75 and STIHL Series 4137 Components, FC, vibrations occur. The level of vibrations
FH, FS etc., contain instructions for replacing the on a machine with the SP attachment
retainers. may be higher than those experienced
on the same machine when it is used as a
Always install three new retainers of the same type
brushcutter. The STIHL SP instruction manual
in one clutch.
contains important user information on the subject
The modification of the clutch for basic power tools of vibrations.
with the Series 4137 powerhead is described in
TI 42.2004.

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4.4 Preparations 4.5 Removing the Loop Handle

. Loosen the clamp screws on the basic power
tool’s gearhead and pull the gearhead off the
drive tube.
The drive shaft may slip out of the tube in this
process. If this happens, push the drive shaft back
into the tube.

. Remove the screws (1) and lift away the loop
handle.
. Keep all parts in a safe place for later assembly.

4.6 Removing Loop Handle with Barrier Bar

The drive shaft must not project from the tube more
than L = 22 mm. If this is not the case:
. Apply slight pressure to the drive shaft and
rotate it slowly at the same time until it can be
pushed in to the required length.

. Remove the screws (1) and lift away the loop
handle.
. Keep all parts in a safe place for later assembly.

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Technical Information 17.2005 Page 5

4.7 Fitting the Handle Hose

. Push the handle hose (1) onto the drive tube. . Push the gearhead (2) onto the drive tube (3) –
turn it back and forth at the same time – until it
The sleeve (2) can be left on the drive tube.
reaches or covers the mark on the drive tube.
Alternative check: The drive tube is correctly
positioned when it completely closes the slot in the
4.8 Mounting the Gearhead
gearhead’s clamp (short arrows).
. Place the power tool on the ground so that it
rests on the machine support.

. Loosen the clamp screws (1) on the gearhead – . Line up the rakes parallel to the machine
do not remove them. support or level with the ground.
. Tighten down the clamp screws on the
gearhead.

. Apply a mark (with pencil or crayon) at distance
A (40 mm) from the end of the drive tube.

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4.9 Mounting the Guard (special accessory for
machines with a Series 4137 powerhead)

390TI000 KN

The guard kit 4138 007 1003 is designed to protect The forkhead (2) performs rapid reciprocating
the powerhead when it is put down on the ground movements during operation. Take care not to
and for resting the machine on the user’s right thigh damage branches with the forkhead.
during operation. Mounting instructions are supplied
with the kit.
This guard can be left on the powerhead when the 3
basic power tool is converted back for use as a
brushcutter or pole pruner, for example.

5. User Instructions
These instructions are outlined in detail in the 1 1
413TI034 KN

manual supplied with the STIHL SP. It is important
point out this information to customers.
In order to avoid consequential damage, do not
5.1 Rakes / Forkhead continue working with the machine if a rake (1) or
one of its tines (3) is broken. Always replace a
damaged rake.

5.2 Working Techniques

To avoid damage to the special harvester, do not run
the rakes (1) off load.

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Technical Information 17.2005 Page 7

. Pay attention to the tree’s limb structure during The bearing points (arrows) of the chain connectors
operation. (1) must always be well lubricated.
. Comb the tree or bush from the inside outwards If the machine is used frequently, check lubrication
in the direction of the tips of the branches. at regular weekly intervals. Clean and lubricate the
bearing points if necessary.
. Do not hold the unit in one spot for too long so
as not to damage leaves and branches. If the machine is used occasionally, check
lubrication at regular monthly intervals. Clean and
. Accelerate the engine and comb the branches
lubricate the bearing points if necessary.
with the rakes while slowly moving them to
and fro at the same time. Use the throttle STIHL SP bearing grease must be used for
trigger to obtain the optimum rake stroke rate lubrication – see 6.1.
(stroke = opening or closing motion of the
The correct lubricating procedure is described in
rakes).
TI 38.2005.
. Open the throttle only while the rakes are
engaged in the branches.
. After combing one section of the tree, pull the 5.3.2 Gearhead
rakes out of the branches and reposition them in
the next section. Repeat this process for all
sections of the tree.

5.3 Lubrication

5.3.1 Rake Drive

The lubricant in the gearhead must be checked
about every 30 hours of operation and replenished
as necessary.
STIHL gear lubricant for hedge trimmers must be
used for lubrication – see 6.1.
Relubricate by pumping no more than 5g of grease
into the gear housing.

Regular inspection and lubrication of the joints of the The lubricant should be changed about every 150
rake drive (every 30 hours of operation) ensures hours of operation by the servicing dealer.
smooth operation and prolongs wear life. The correct lubricating procedure is described in
Bearing points that are not properly lubricated wear TI 38.2005.
at a faster rate due to the ingress of dust and/or
liquid, organic material and may damage the rake
drive.

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5.4 Maintenance The difference between the two dimensions (b - a)
must be less than 4 mm. If this is not the case,
5.4.1 Checking Rake Clearance check the rake drive and gearhead and repair as
It is important to regularly check the clearance necessary.
between the two rakes to ensure correct operation
and prolong the service life of the gearhead and
rake drive.

6. Accessories

6.1 General
Description Part No. Application
STIHL gear Gearhead
lubricant for
hedge trimmers
- 80 g tube 0781 120 1109
- 225 g tube 0781 120 1110

STIHL SP Chain
bearing grease connectors
- 60 g tube 0781 120 1006
. Close the rakes and set them to their closest
point – the forkhead should be at the bottom of
its stroke.
Handle hose 4231 791 2000 Left handle
. With forefinger and thumb, grip the gullets of the on drive tube
inner tines and gently squeeze the rakes
together.
. Measure the distance (a) between the tips of the
tines – do not bend the tines in this process.
6.2 Service Accessories

6.2.1 Special Servicing Tools
The special servicing tools are described in
TI 38.2005.

. With forefinger and thumb, grip the gullets of the
inner tines and gently ease the rakes apart.
. Measure the distance (b) between the tips of the
tines – do not bend the tines in this process.

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7. Repairs 7.3 Repair Times

If the machine is started up in the course of repairs, The times listed assume that the work is performed
it is essential to observe all country-specific safety by trained personnel in a properly equipped
regulations outlined in the instruction manual. workshop.
Repair times are quoted in minutes.

7.1 Rake Drive / Forkhead Repair procedure SP
A “rake kit” for repairing the rake drive is available 1 Replacing gearhead or bearing
under part number 4231 740 7251. This kit contains housing 5
2 rakes, 2 chain connectors and 1 forkhead.
2 Replacing 1 rake 2
This kit should be used to replace all parts of the 3 Installing rake kit
rake drive even if only one side is worn. (incl. chain connectors, forkhead) 12
4 Lubricating chain connectors 2
5 Replacing crown wheel 14
7.2 Servicing Instructions and 6 Replacing connecting rod 14
Tightening Torques
7 Replacing forkhead 12
Refer to TI 38.2005 for all servicing instructions and
tightening torques.

8. Spare Parts
Parts documentation is available for the new
machine.

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