Sherpa ST-R50ES Installation and maintenance instructions

OPERATOR’S MANUAL AND PARTS LIST
PETROL LAWNMOWER - ST-R50ES
Spares & Support: 0845 123 5844
www.sherpatools.co.uk
Before use please read & understand this manual, paying particular
attention to the safety instructions.
30/03/2012 v1

Page 2
CONTENTS
SAFETY INSTRUCTIONS 3
MAJOR PARTS 4
ASSEMBLY AND OPERATION 5-6
MAINTENANCE 7
PARTS DIAGRAM AND LIST 8-9
SPECIFICATIONS 10
EC DECLARATION OF CONFORMITY 11

Page 3
SAFETY INSTRUCTIONS

the lawn mower. Learn its application and limitations as well
        
reference.
x Use sturdy footwear - do not operate when barefoot or wearing
open sandals.
x Do not put handsor feet near or under rotating parts. Keep clear
of the discharge opening at all times.
x Do NOT operate the lawn mower if you are tired, ill or under the

x Do NOT smoke when using the lawn mower and ensure caution
when handling fuel. We recommend you fuel the machine away
from where you wish to work to prevent any spilt fuel igniting
when you start the engine.
x Ensure that bystanders, children and pets keep well away
when mowing and only allow persons familiar with these
instructions to use the lawn mower.
x Inspect the lawn mower, and in particular the blade, before use for
any worn or damaged parts. Do not use until the parts are repaired
or replaced with parts approved by the manufacturer.
x Before starting the engine make sure the lawn is clear of obstacles
such as stones, branches or children’s toys.
x Always stop the engine when crossing gravel drives, walks or
roads. Stop the engine and allow the blade to stop rotating
before removing the grass bag for emptying.
x Stop the engine and disconnect the spark plug before clearing
blockages, cleaning or inspecting the mower.
x Do not operate when raining and take particular care on damp
grass which can prove slippery, particularly on slopes.
x When mowing on a slope always mow across the slope, not up
and down. Take care when changing direction. The slope should
not exceed 20 degrees.
 Clean the mower after each use and, if storing for a prolonged
period, drain down the fuel in the tank. Remove the spark plug
and put a few drops of oil into the cylinder before pulling the
starter a couple of times to distribute the oil evenly. Replace the
spark plug. If you need to tilt the mower while cleaning always tip
it backwards, towards the handles, do not tip it on its side as this
will cause oil to enter the carburettor or exhaust.

Page 4
MAJOR PARTS
Drive lever
Brake lever
Starter handle
Grass catcher
Height adjust handle
Oil dipstick
Quick fix handle
Fuel cap
Primerbutton
Air filter
Spark plug
Exhaust muffler
Push button start
Side discharge
Dash board
Motor

Page 5
ASSEMBLY AND OPERATION
The lawn mower is shipped without oil or petrol in the
engine.
The mower has been assembled and tested in the factory and
only needs a small amount of assembly.
 Remove the mower carefully from the box - it may be easier
to remove one side of the box and roll the machine out.
 Depress the Operator Presence Control Bar Unfold
handles carefully so as not to pinc the cables then raise
the lower handles. Fit the two bolts and wingnuts from the
parts bag, which will lock the lower handle into place. Raise
with the upper handle section so that it lines up with the lower
lower handle section. Tighten the wingnuts.
 Fit the dashboard using the four bolts and nuts as shown in
the diagram.
 The diagram shows the position of the three parts of the
upper handle.
 The brake lever (sometimes called the operator presence
control lever) must be pulled back towards the handle to
start the engine and during operation. If the lever is
released it will automatically stop the engine.
 The drive control lever - pull this lever up towards the han-
dle to engage the self-propelled mode. If this is not engaged
the mower can be used in ‘push’ mode.
 The engine speed has been set at the factory for optimum
performance - it is not adjustable.
Before your initial use of the mower and at the beginning
of every season, charge the battery for 5-6 hours.
 The cutting height can be adjusted by a single lever through
5 positions from 25-75mm. The medium position is best for
most lawns. Under certain conditions, such as very tall grass,
it may be necessary to cut the grass twice, once on the highest
setting and then again on medium.
Operation:
 Fill the engine with SAE30 oil to the ‘full’ mark on the
dipstick. Check the level of the oil.
 Fill the fuel tank with unleaded petrol.
 a cold startto allow fuel
into the engine.
 Pull the brake lever back to the push handle and press the
start button until the engine starts and runs.
 The machine can also be started using the pull cord (if the

and pull starter cord until resistance is felt, then pull rapidly
to start the engine.
Note: if the brake lever is released the engine will stop.
 Pull the drive control lever up towards the handle and the
lawnmower will self-propel.

Page 6
OPERATION cont’d
The mower has four different operating modes.
1. Collecting:
 Ensure that the side cover is closed.
 
the front of the box to the shaft on the mower.
  the
 When the box isfull, the grass will be visible through the viewing
window in the top of the box.
 Stop the engine before emptying the grassbox.
2. Rear Discharge:
 Ensure that the side cover is closed.
 removti-
on, the mower will cut and discharge the grass from the rear of
the machine.
3. Side Discharge:
 Fit the mulch plug to the rear discharge opening of the mower

 Lift the cover on the side of the mower and attach the side dis-
charge chute as shown in the diagram.
 The mower will now eject grass from the side discharge chute.
4. Mulching:
 Fit the mulch plug to the rear discharge opening of the mower
and close the rear flap.
 Ensure that the side cover is in the closed position (with the
discharge  removed
 The mower will now recycle the chopped grass into the lawn
surface.
 

Page 7
MAINTENANCE
Regular careful maintenance is essential for keeping the lawn-
mower in good condition.
 Before each use, ensure that all bolts, nuts and screws are
tight.
 After each use, allow the mower to cool down before clean-
ing off any grass and other debris. Use a brush or com-
pressed air and avoid getting water into the engine.
 Never store the mower with petrol in the tank within an en-
closed area where it is possible for fumes to reach an open

 When storing for a long period drain the mower of fuel after
the engine has cooled down. Do this outside to reduce any

  of useevery
season or every 50 hours of use. Dispose of waste oil at
your local recycling centre.
 Clean the spark plug regularly and change every season.
To change the blades:
 Drain the fuel tank by running the mower until the fuel tank
is empty and the engine stops.
 Allow the engine to cool and then tip on to its left hand side
(air cleaner side uppermost).
 Using gloves to protect your hands, undo the screw and re-
move the old blade and replace with a new one in the order
shown on the diagram below.
 
A damaged blade that is out of balance will cause the
mower to vibrate and may break. Check the condition of
the blade regularly.

 
elements.
 
refitted.
 If the paper element is heavily contaminated it should be
replaced using a genuine part from your local dealer.

Page 8
PARTS DIAGRAM

Page9
PARTSLIST
No. Part No. Description QTY No. Part No. Description QTY No. Part No. Description QTY
1 TH169-1 Foam Pipe 1 36 TH169-36 Left Steel Wire Spring 1 71 TH169-71 Blade Washer 1
2 TH169-2 Stop Lever 1 37 TH169-37 Spring for Self-propelled
Cable 1 72 TH169-72 510 Blade B 1
3 TH169-3 B Type Self-propelled Lever 1 38 TH169-38 Self-propelled Spring 1 73 TH169-73 Short Bush Blade
Adapter 1
4 TH169-4 B1 Type Upper Handle for
Dash Board 1 39 TH169-39 Rear Drive Shaft Assy for
Self-propelled 1 74 TH169-74 Short Bush for Blade
Adapter 1
5 TH169-5 II Type Hex Locknut M6/8.8 8 40 TH169-40 Right Steel Wire Spring 1 75 TH169-75 Long Key for Crankshaft 1
6 TH169-6 Hex Flange Face Bolt
M6x35/8.8 1 41 TH169-41 Pin 2 76 TH169-76 Small Belt Wheel 1
7 TH169-7 Rope Guide 1 42 TH169-42 Height Adjustment Handle
Ball 1 77 TH169-77 V Type Belt 1
8 TH169-8 Brake and Self-Propelled
Cable 1 43 TH169-43 Small Straight Gear
(Ratchet Wheel R) 1 78 TH169-78 Hex Flange Face Bolt
M10x25/8.8 3
9 TH169-9 Shaft for Battery Box 1 44 TH169-44 Mulching Plug 1 79 TH169-79 Catcher Assy 1
10 TH169-10 Knob 2 45 TH169-45 Cross Recess Pan Head
Tapping Screw 4 79-1 TH169-79-1 60L Plastic Bag 1
11 TH169-11 Plug for Handle 2 46 TH169-46 Rear Baffle 1 79-2 TH169-79-2 Cover for Plastic Bag 1
12 TH169-12 Knob 2 47 TH169-47 Cross Recess Pan Head
Tapping Screw 5 80 TH169-80 Combined A for Control
Cable 1
13 TH169-13 Flat Washer/8.4x16x1.6 4 48 TH169-48 B Type Belt Cover 1 81 WE102-81 Board With Logo 1
14 TH169-14 Carriage Bolt M8x50/8.8 2 49 TH169-49 Height Adjustment Pull
Rod 1 82 WE102-82 Upper Cover for Dash
Board 1
15 TH169-15 I Type Hex Nut M8/8.8 6 50 TH169-50 Coarse Thread Hex Bolt
M8×16/8.8 2 83 WE102-83 Circle Cover for Board 1
16 TH169-16 B Type Lower Handle 2 51 TH169-51 Left Side Board 1 84 TH169-84 Flick Spring for Cover 2
17 TH169-17 Fastener 1 52 TH169-52 II Type Hex Locknut
M8/8.8 4 85 TH169-85 Flick Shaft for Cover 2
18 TH169-18 Thin Knob 2 53 TH169-53 T675 Engine 1 86 TH102-86 Dash Board Pedestal 1
19 TH169-19 Carriage Bolt M8X30/8.8 2 54 TH169-54 Right Side Board 1 87 TH169-87 Hex Flange Face Bolt
M6X28/8.8 4
20 TH169-20 Fastener 1 55 TH169-55 Carriage Bolt M8X15/8.8 2 88 TH169-88 The Board of Rear
Discharge 1
21 TH169-21 Rear Discharge Cover 1 56 TH169-56 Board for Height Adjuster 1 89 TH169-89 Cross Recess Pan Head
Tapping 1
22 TH169-22 Shaft for Rear Discharge
Cover 1 57 TH169-57 Mulching Board 1 90 TH169-90 Spring for Pull Rod 1
23 TH169-23 Spring for Rear Discharge
Cover 1 58 TH169-58 Mulch Spring 1 91 TH169-91 Cross Recess Pan Head
Tapping 1
24 TH169-24 Lock Washer 2 59 TH169-59 Side Discharge Cover 1 92 TH169-92 Button Pedestal 1
25 TH169-25 Pin 4 60 TH169-60 Mulch Shaft 1 93 TH169-93 Spring for Button 1
26 WE102-26 Outside Cover for B Type
10" Wheel Hub 2 61 TH169-61 Hex Flange Face Bolt M5X10/8.8 4 94 TH169-94 Button 1
27 TH169-27 Flexible Washer 6 62 TH169-62 II Type Hex Locknut
M5/8.8 4 95 TH169-95 Flat Washer 2
28 TH169-28 Washer /13x20x1.5 6 63 TH169-63 Bracket Press Board 1 96 TH169-96 Carriage Bolt M8x25/8.8 2
29 TH169-29 Punching Bearing 8 64 WE102-64 Deck 1 97 TH169-97 1
30 TH169-30 B Type 10" Wheel Assy 2 65 TH169-65 Hex Flange Face Bolt
M6X12/8.8 2 98 TH169-98 Flat Washer 2
31 TH169-31 Inner Cover for B Type 10"
Wheel Hub 2 66 WE102-66 Outside Cover for B Type
7" Wheel Hub 2 99 TH169-99 Cross Recess Pan Head
Tapping 4
32 TH169-32 Washer for Inner Cover of
10" Wheel 39.3x13.1x1 2 67 TH169-67 B Type 7" Wheel Assy 2 100 TH169-100 Upper Cover for Battery 1
33 TH169-33 Flexible Washer 2 68 TH169-68 Front Drive Shaft Assy 1 101 TH169-101 II Type Hex Locknut
M4/8.8 4
34 TH169-34 Small Straight Gear (Ratchet
Wheel L) 1 69 TH169-69 Front Bracket Fastener 1 102 TH169-102 Fastener 1
35 TH169-35 Washer for Ratchet Wheel 2 70 TH169-70 Hex Flange Face Bolt A 1 103 TH169-103 Battery Pedestal 1
104 TH169-104 Battery 1

PARTS DIAGRAM - ENGINE