Efco DS Series Instruction manual

WORKSHOP MANUAL
BRUSCHCUTTERS DS 2200 - DS 2400

MODEL DS 2200 TR DS 2200 S DS 2200 T DS 2400 S DS 2400 T
ENGINE
TYPE Emak, 2-stroke (EPA 3, 125h) KAT
DISPLACEMENT cu. in. 1.3
BORE inch 1.26
STROKE inch 1.06
MAXIMUM POWER OUTPUT HP/kW
(rpm) 1,1 / 0,82 (8500) 1,2 / 0,9 (8500)
MAXIMUM TORQUE Nm (rpm) 1,1 (6500) 1,2 (6500)
IDLING SPEED rpm 2800
MAXIMUM SPEED (with blade) rpm 9000 10500 10500
IGNITION SYSTEM
TYPE Digital
COIL WALBRO MBU53
SPARK PLUG NGK CMR7H
EASY START Yes
FUEL & LUBRICATION SYSTEM
Carburetor WALBRO WT-1041
FUEL Compatibility with Ethanol 15% gasoline and alkylate petrol
FUEL TANK CAPACITY . oz. 1,36
AIR FILTER Sponge cloth
PRIMER Yes
TRANSMISSION SYSTEM
TRANSMISSION tube Ø (DRIVE
SHAFT) inch Ø .87 (Ø .24 ex) Ø .94 (Ø .24 ex) Ø .94 (Ø .27 rigid)
ROD LENGTH inch - 59
BEVEL GEAR PAIR pin male
M8x1,25 sx pin male M10x1,25 sx
CLUTCH COVER Plastic with aluminum drum support Aluminium
CLUTCH (DIMENSION) inch 2,13
ERGONOMICS
HARNESS Optional Single harness Optional Single strap with
cushion
FRONT HANDLE plastic loop steel handlebar plastic loop +
soft touch
aluminum
handlebar
REAR HANDLE plastic plastic +
soft touch
plastic +
soft touch
ON / OFF SWITCH Button (always on)
ANTI-VIBRATION SYSTEM Nylon Sheath + damping
rubber in clutch cover
Nylon Sheath +
damping rubber in
clutch cover+
2 rubber in
handlebar support
Nylon Sheath +
damping rubber in
clutch cover
Nylon Sheath +
damping rubber in
clutch cover+
2 rubber in
handlebar support
CUTTING SYSTEM
STANDARD CUTTING DISC unavailable Kit optional (steel blade+plastic guard) 3 teeth 10”
STANDARD NYLON STRINGHEAD
Special
Ø 3.03 inch
line .08 inch
Load &Go
Ø 4.3 inch
line .094 inch
Load &Go
Ø 4.3 inch
line .094 inch
Load &Go
Ø 5.1 inch
line .094 inch
Load &Go
Ø 5.1 inch
line .094 inch
CUTTING GUARD - CUTTING
WIDTH (with stringhead) bikini/
european style
Ø inch 15.75 14.57 15.75 14.57
WEIGHT (Without cutting tools) lb 8,3 9,04 10,6 9,2 11,57
POWER-TO-WEIGHT RATIO lb / Hp 7,5 8,2 9,6 7,7 9,6

pag. 4
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
INDEX
1. GENERAL INFORMATION ........................................................................ 5
2. SAFETY ................................................................................................... 7
3. FASTENER TORQUES .............................................................................. 10
3.1 Metric Fastener Torque Values.............................................................................. 10
3.2 Inch Fastener Torque Values ................................................................................ 11
3.3 Fastener torques of the DS 2400 ............................................................................. 12
3.4 Fastener torques of the DS 2200 ............................................................................. 15
4. SERIAL NUMBER................................................................................... 18
5. STARTER............................................................................................... 19
6. MUFFLER .............................................................................................. 24
7. IGNITION ............................................................................................. 26
8. CLUTCH ................................................................................................ 30
9. TRANSMISSION.................................................................................... 31
10. BEVEL GEAR ....................................................................................... 33
11. SHORT BLOCK..................................................................................... 37
12. PISTON FAILURE ANALYSIS ............................................................... 40
13. FUEL SYSTEM...................................................................................... 42
14. CARBURETOR TUNING ........................................................................ 48
15. TROUBLE SHOOTING .......................................................................... 49

BRUSCHCUTTERS DS 2200 - DS 2400
pag. 5
Workshop manual
1. GENERAL INFORMATION
General Information
2-Cycle Engines
CAUTION: Avoid Injury! Gasoline is
HIGHLY FLAMMABLE, handle it with care.
DO NOT refuel machine while:
indoors, always ll gas tank outdoors;
machine is near an open flame or
sparks;
engine is running, STOP engine;
engine is hot, allow it to cool sufciently
rst;
smoking.
Help prevent res:
ll gas tank to bottom of ller neck only;
be sure ll cap is tight after fueling;
keep machine clean and in good repair-
free of excess grease, oil, debris, and
faulty or damaged parts;
clean up any gas spills IMMEDIATELY;
any storage of machines with gas left
in tank should be in an area that is well
ventilated to prevent possible igniting
of fumes by an open ame or spark, this
includes any appliance with a pilot light.
To prevent fire or explosion caused by
STATIC
ELECTRIC DISCHARGE during fueling:
ONLY use a clean, approved POLYETHYLENE
PLASTIC fuel container and funnel
WITHOUT any metal screen or lter.
•
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•
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•
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•
To avoid engine damage:
CAUTION: Avoid injury! California Proposition
65 Warning: Gasoline engine exhaust from this
product contains chemicals known to the State of
California to cause cancer, birth defects, or other
reproductive harm.
CAUTION: Avoid Injury! DO NOT use METHANOL
gasolines because METHANOL is harmful to the
environment and to your health.
ONLY use fresh, clean, unleaded gasoline with
an octane rating (anti-knock index) of 89 or
higher;
Mix in EFCO 2-Cycle Engine Oil or its equivalent
using a 50:1 fuel/oil mixture.
If EFCO 2-Cycle Engine Oil or its equivalent IS NOT
being used, mix alternative 2-cycle engine oil to
a 25:1 fuel/oil mixture.
Use of alternative oxygenated, gasohol blended,
unleaded gasoline is acceptable as long as:
the ethyl or grain alcohol blends DO NOT exceed
15% by volume or
methyl tertiary butyl ether (MTBE) blends DO NOT
exceed 15% by volume.
•
•
•
•
•

pag. 6
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
1. GENERAL INFORMATION
Gasoline Storage
IMPORTANT: Keep all dirt, scale, water or
other foreign material out of gasoline.
Keep gasoline stored in a safe, protected area.
Storage of gasoline in a clean, properly marked
(“UNLEADED GASOLINE”) POLYETHYLENE
PLASTIC container WITHOUT any metal screen
or lter is recommended. DO NOT use de-icers to
attempt to remove water from gasoline or depend
on fuel lters to remove water from gasoline. Use
a water separator installed in the storage tank
outlet. BE SURE to properly discard unstable or
contaminated gasoline.
2-CYCLE AIR COOLED ENGINE OIL.
Other oils may be used if above preferred oil
is not available, provided they meet one of the
following specications:
SAE Standard J2116 or Classications TA, TB,
TC, or TD;
API Classication TC or higher;
NMMA Classifications TC-W or TC-WII or
higher;
JASO Classications FA, FB, or FC or higher;
CEC Standard L-19-T-77.
Alternative Lubricants
IMPORTANT: Use of alternative lubricants
could cause reduced life of the component
or void the warranty.
Conditions in certain geographical areas outside
the United States and Canada may require
different lubricant recommendations than the ones
printed in this technical manual or the operator’s
manual. Consult with your EFCO Dealer, to obtain
the alternative lubricant recommendations.
Synthetic Lubricants
Synthetic lubricants may be used in EFCO
equipment if they meet the applicable performance
requirements.
The recommended air temperature limits and
service or lubricant change intervals should be
maintained as shown in the operator’s manual,
unless otherwise stated on lubricant label.
In general, avoid mixing different brands, grades
or types of lubricants. Manufacturers blend
additives in their lubricants to meet certain
specications and performance requirements.
Mixing different lubricants can interfere with
the proper functioning of these additives and
lubricant properties which will downgrade their
•
•
•
•
•
•
•
intended specied performance.
Mixing Of Lubricants
In general, avoid mixing different brands, grades
or types of lubricants. Manufacturers blend
additives in their lubricants to meet certain
specications and performance requirements.
Mixing different lubricants can interfere with
the proper functioning of these additives and
lubricant properties which will downgrade their
intended specied performance.

BRUSCHCUTTERS DS 2200 - DS 2400
pag. 7
Workshop manual
2. SAFETY
Recognize Safety Information
This is the safety-alert symbol. When you see this
symbol on your machine or in this manual, be
alert to the potential for personal injury. Follow
recommended precautions and safe servicing
practices.
Understand Signal Words
A signal word - DANGER, WARNING, or CAUTION
- is used with the safety-alert symbol. DANGER
identies the most serious hazards.
DANGER or WARNING safety signs are located
near specific hazards. General precautions
are listed on CAUTION safety signs. CAUTION
also calls attention to safety messages in this
manual.
Handle Fluids Safely - Avoid Fires
Be Prepared For Emergencies
When you work around fuel, do not smoke or
work near heaters or other re hazards.
Store ammable uids away from re hazards.
Do not incinerate or puncture pressurized
•
•
containers.
Make sure machine is clean of trash, grease,
and debris.
Do not store oily rags; they can ignite and burn
spontaneously.
Be prepared if a re starts.
Keep a first aid kit and fire extinguisher
handy.
Keep emergency numbers for doctors, ambulance
service, hospital, and re department near your
telephone.
Wear Protective Clothing
Wear close tting clothing and safety equipment
appropriate to the job.
•
•
•
•
•

pag. 8
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
2. SAFETY
Prolonged exposure to loud noise can cause
impairment or loss of hearing. Wear a suitable
hearing protective device such as earmuffs or
earplugs to protect against objectionable or
uncomfortable loud noises.
Operating equipment safely requires the full
attention of the operator. Do not wear radio or
music headphones while operating machine.
Service Machines Safely
Tie long hair behind your head. Do not wear a
necktie, scarf, loose clothing, or necklace when
you work near machine tools or moving parts.
If these items were to get caught, severe injury
could result.
Remove rings and other jewelry to prevent
electrical shorts and entanglement in moving
parts.
Use Proper Tools
Use tools appropriate to the work. Makeshift tools
and procedures can create safety hazards. Use
power tools only to loosen threaded parts and
fasteners. For loosening and tightening hardware,
use the correct size tools. DO NOT use U.S.
measurement tools on metric fasteners. Avoid
bodily injury caused by slipping wrenches. Use
only service parts meeting Emak specications.
Before working on the machine:
Lower all equipment to the ground.
Stop the engine
Hang a “DO NOT OPERATE” tag in operator
station.
1.
2.
3.
Support Machine Properly and Use Proper
Lifting Equipment
If you must work on a lifted machine or
attachment, securely support the machine or
attachment.
Do not support the machine on cinder blocks,
hollow tiles, or props that may crumble under
continuous load. Follow recommended procedures
in this manual.
Follow recommended procedure for removal and
installation of components in the manual.
Work In Clean Area
Before starting a job:
Clean work area and machine.
Make sure you have all necessary tools to do
your job.
Have the right parts on hand.
Read all instructions thoroughly; do not
attempt shortcuts.
Using High Pressure Washers
Directing pressurized water at electronic/
electrical components or connectors, bearings,
hydraulic seals, fuel injection pumps or other
sensitive parts and components may cause
product malfunctions. Reduce pressure and spray
at a 45 to 90 degree angle.
Illuminate Work Area Safely
Illuminate your work area adequately but safely.
Use a portable safety light for working inside the
machine. Make sure the bulb is enclosed by a wire
cage. The hot lament of an accidentally broken
bulb can ignite spilled fuel or oil.
1.
2.
3.
4.

BRUSCHCUTTERS DS 2200 - DS 2400
pag. 9
Workshop manual
2. SAFETY
Work In Ventilated Area
Engine exhaust fumes can cause sickness or
death. If it is necessary to run an engine in an
enclosed area, remove the exhaust fumes from
the area by opening doors to get outside air into
the area.
Warning: California Proposition 65 Warning
Gasoline engine exhaust from this product
contains chemicals known to the State of
California to cause cancer, birth defects, or other
reproductive harm. Remove Paint Before Welding
or Heating Avoid potentially toxic fumes and dust.
Hazardous fumes can be generated when paint
is heated by welding, soldering, or using a torch.
Do all work outside or in a well ventilated area.
Dispose of paint and solvent properly. Remove
paint before welding or heating: If you sand or
grind paint, avoid breathing the dust. Wear an
approved respirator. If you use solvent or paint
stripper, remove stripper with soap and water
before welding. Remove solvent or paint stripper
containers and other ammable material from
area. Allow fumes to disperse at least 15 minutes
before welding or heating.
Avoid Injury From Rotating Blades
Keep hands and feet away while machine is
running. Shut off power to service, lubricate, or
remove blades.
Handle Chemical Products Safely
Direct exposure to hazardous chemicals can cause
serious injury. Potentially hazardous chemicals
used with EMAK equipment include such items as
lubricants, coolants, paints, and adhesives.
Dispose of Waste Properly
Improperly disposing of waste can threaten the
environment and ecology. Potentially harmful
waste used with EMAK equipment include such
items as oil, fuel, coolant, brake uid, lters, and
batteries. Use leakproof containers when draining
uids. Do not use food or beverage containers
that may mislead someone into drinking from
them. Do not pour waste onto the ground, down
a drain, or into any water source. Inquire on the
proper way to recycle or dispose of waste from
your local environmental or recycling center, or
from your EMAK dealer.
Live With Safety
Before returning machine to customer, make sure
machine is functioning properly, especially the
safety systems. Install all guards and shields.

pag. 10
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
3. FASTENER TORQUES
3.1 Metric Fastener Torque Values
Class 4.8 Class 8.8 or 9.8 Class 10.9 Class 12.9
Lubricated a Dry a Lubricated a Dry a Lubricated a Dry a Lubricated a Dry a
SIZE N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft
M6 4.8 3.5 6 4.5 9 6.5 11 8.5 13 9.5 17 12 15 11.5 19 14.5
M8 12 8.5 15 11 22 16 28 20 32 24 40 30 37 28 47 35
M10 23 17 29 21 43 32 55 40 63 47 80 60 75 55 95 70
M12 40 29 50 37 75 55 95 70 110 80 140 105 130 95 165 120
M14 63 47 80 60 120 88 150 110 175 130 225 165 205 150 260 109
M16 100 73 125 92 190 140 240 175 275 200 350 225 320 240 400 300
M18 135 100 175 125 260 195 330 250 375 275 475 350 440 325 560 410
M20 190 140 240 180 375 275 475 350 530 400 675 500 625 460 800 580
M22 260 190 330 250 510 375 650 475 725 540 925 675 850 625 1075 800
M24 330 250 425 310 650 475 825 600 925 675 1150 850 1075 800 1350 1000
M27 490 360 625 450 950 700 1200 875 1350 1000 1700 1250 1600 1150 2000 1500
M30 675 490 850 625 1300 950 1650 1200 1850 1350 2300 1700 2150 1600 2700 2000
M33 900 675 1150 850 1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750
M36 1150 850 1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500
DO NOT use these hand torque values if a different
torque value or tightening procedure is given for
a specic application. Torque values listed are for
general use only and include a ±10% variance
factor. Check tightness of fasteners periodically.
DO NOT use air powered wrenches.
Shear bolts are designed to fail under
predetermined loads. Always replace shear bolts
with identical grade.
Fasteners should be replaced with the same
grade. Make sure fastener threads are clean and
that you properly start thread engagement. This
will prevent them from failing when tightening.
When bolt and nut combination fasteners are
used, torque values should be applied to the NUT
instead of the bolt head.
Tighten toothed or serrated-type lock nuts to the
full torque value.
a “Lubricated” means coated with a lubricant
such as engine oil, or fasteners with phosphate
and oil coatings.
“Dry” means plain or zinc plated without any
lubrication.
1.

BRUSCHCUTTERS DS 2200 - DS 2400
pag. 11
Workshop manual
3. FASTENER TORQUES
3.2 Imperial inch Fastener Torque Values
Grade 1 Grade 2b Grade 5, 5.1 or 5.2 Grade 8 or 8.2
Lubricated a Dry a Lubricated a Dry a Lubricated a Dry a Lubricated a Dry a
SIZE N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft N●m lb-ft
1/4 3.7 2.8 4.7 3.5 6 4.5 7.5 5.5 9.5 7 12 9 13.5 10 17 12.5
5/16 7.7 5.5 10 7 12 9 15 11 20 15 25 18 28 21 35 26
3/8 14 10 17 13 22 16 27 20 35 26 44 33 50 36 63 46
7/16 22 16 28 20 35 26 44 32 55 41 70 52 80 58 100 75
1/2 33 25 42 31 53 39 67 50 85 63 110 80 120 90 150 115
9/16 48 36 60 45 75 56 95 70 125 90 155 115 175 130 225 160
5/8 67 50 85 62 105 78 135 100 170 125 215 160 215 160 300 225
3/4 120 87 150 110 190 140 240 175 300 225 375 280 425 310 550 400
7/8 190 140 240 175 190 140 240 175 490 360 625 450 700 500 875 650
1 290 210 360 270 290 210 360 270 725 540 925 675 1050 750 1300 975
1-1/8 470 300 510 375 470 300 510 375 900 675 1150 850 1450 1075 1850 1350
1-1/4 570 425 725 530 570 425 725 530 1300 950 1650 1200 2050 1500 2600 1950
1-3/8 750 550 950 700 750 550 950 700 1700 1250 2150 1550 2700 2000 3400 2550
1-1/2 1000 725 1250 925 990 725 1250 930 2250 1650 2850 2100 3600 2650 4550 3350
DO NOT use these hand torque values if a different
torque value or tightening procedure is given for
a specic application. Torque values listed are for
general use only and include a ±10% variance
factor. Check tightness of fasteners periodically.
DO NOT use air powered wrenches.
Shear bolts are designed to fail under
predetermined loads. Always replace shear bolts
with identical grade.
Fasteners should be replaced with the same
grade. Make sure fastener threads are clean and
that you properly start thread engagement. This
will prevent them from failing when tightening.
When bolt and nut combination fasteners are
used, torque values should be applied to the NUT
instead of the bolt head.
Tighten toothed or serrated-type lock nuts to the
full torque value.
“Lubricated” means coated with a lubricant
such as engine oil, or fasteners with phosphate
and oil coatings.
“Dry” means plain or zinc plated without any
lubrication.
“Grade 2” applies for hex cap screws (Not Hex
Bolts) up to 152 mm (6 in.) long. “Grade 1”
applies for hex cap screws over 152 mm (6
in.) long, and for all other types of bolts and
screws of any length.
a.
b.

3.3 Fastener torques of the DS 2400
Tightening torques
in lb (kgm) / lubrication
* = Loctite 243
∆ = Loctite 270
G = Grease
O = Oil
pag. 12
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
3. FASTENER TORQUES
39.83
(0.45)
39.83
(0.45)
35.4
(0.4) *
7.97
(0.09) *
35.4
(0.4) *
22.13
(0.25) *
22.13
(0.25) *
70.80
(0.8) *
159.3
(1.8)
17.7
(0.2)
17.7
(0.2)
12.39
(0.14)
30.98
(0.35)
39.83
(0.45)
39.83
(0.45)
35.4
(0.4) *
12.39
(0.14) *

Tightening torques
in lb (kgm) / lubrication
* = Loctite 243
∆ = Loctite 270
G = Grease
O = Oil
BRUSCHCUTTERS DS 2200 - DS 2400
pag. 13
Workshop manual
3. FASTENER TORQUES
39.83
(0.45)
39.83
(0.45)
35.4
(0.4) *
7.97
(0.09) *
35.4
(0.4) *
22.13
(0.25) *
22.13
(0.25) *
70.80
(0.8) *
159.3
(1.8)
12.39
(0.14) 12.39
(0.14)
12.39
(0.14)
39.83
(0.45)
30.98
(0.35)
35.4
(0.4) *
12.39
(0.14) *
39.83
(0.45)

Tightening torques
in lb (kgm) / lubrication
* = Loctite 243
∆ = Loctite 270
G = Grease
O = Oil
pag. 14
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
3. FASTENER TORQUES
30.98
(0.35) *
26.55
(0.3) *
26.55
(0.3) *
35.4
(0.4)
35.4
(0.4)
61.95
(0.7) *
22.13
(0.25) *
44.25
(0.5) *
30.98
(0.35) *
132.76
(1.5)
70.80
(0.8) *
53.1
(0.6) *
26.55
(0.3) *
4.86
(0.055)
39.83
(0.45)
30.98
(0.35) *
35.4
(0.4) *
35.4
(0.4) *
132.76
(1.5) ∆
70.80
(0.8) *
10.62
(0.12)

3.4 Fastener torques of the DS 2200
Tightening torques
in lb (kgm) / lubrication
* = Loctite 243
∆ = Loctite 270
G = Grease
O = Oil
BRUSCHCUTTERS DS 2200 - DS 2400
pag. 15
Workshop manual
3. FASTENER TORQUES
39.83
(0.45)
39.83
(0.45)
159.3
(1.8)
17.7
(0.2)
17.7
(0.2)
12.39
(0.14)
39.83
(0.45)
39.83
(0.45)
35.4
(0.4) *
12.39
(0.14) *
30.98
(0.35)
70.80
(0.8) *
30.98
(0.35) *
30.98
(0.35) *
30.98
(0.35) *
9.74
(0.11) *

Tightening torques
in lb (kgm) / lubrication
* = Loctite 243
∆ = Loctite 270
G = Grease
O = Oil
pag. 16
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
3. FASTENER TORQUES
12.39
(0.14) 12.39
(0.14)
39.83
(0.45)
30.98
(0.35)
35.4
(0.4) *
12.39
(0.14) *
39.83
(0.45)
39.83
(0.45)
39.83
(0.45)
159.3
(1.8)
12.39
(0.14)
70.80
(0.8) *
30.98
(0.35) *
30.98
(0.35) *
30.98
(0.35) *
9.74
(0.11) *

Tightening torques
in lb (kgm) / lubrication
* = Loctite 243
∆ = Loctite 270
G = Grease
O = Oil
BRUSCHCUTTERS DS 2200 - DS 2400
pag. 17
Workshop manual
3. FASTENER TORQUES
26.55
(0.3) *
26.55
(0.3) *
35.4
(0.4)
35.4
(0.4)
61.95
(0.7) *
44.25
(0.5) *
30.98
(0.35) *
132.76
(1.5)
53.1
(0.6) *
26.55
(0.3) *
39.83
(0.45)
132.76
(1.5) ∆
70.80
(0.8) *
70.80
(0.8) *
30.98
(0.35) *
30.98
(0.35) *
4.86
(0.055)
10.62
(0.12)
35.4
(0.4) *

pag. 18
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
4. SERIAL NUMBER
The serial number identies the machine model,
date of production and progressive number of
produced machines.
EXAMPLE
9 1 6 2 0 3 0 0 0 1
1 = MODEL
2 = YEAR
3 = WEEK
4 = PROGRESSIVE NUMBER
1 2 3 4

BRUSCHCUTTERS DS 2200 - DS 2400
pag. 19
Workshop manual
- 5. STARTER
STARTER ASSEMBLY
Remove the 4 screws Torx 25.
Release the tension on the recoil spring, slowly wind
anticlockwise the pulley.
Remove the inner starter assist spring.
Lift out spring assist pulley.
1.
2.
3.
4.

pag. 20
BRUSCHCUTTERS DS 2200 - DS 2400
Workshop manual
5. STARTER
Check condition of pulley especially in the assist
spring seat.
During re-assembly make sure the end of the
spring is correctly through the seat in the pulley.
Inspect the condition of the spring and lubricate
with a light grease or oil.
Check the condition of the seat for the return
spring.
5.
6.
7.
8.