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Stiga Primo 2008 Workshop Manual Download Page 45

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2008-03-18 Workshop Manual, Stiga Primo 6 Mower Decks

2

6.1 General

The decks are equipped with two synchronised rotating blades. The tracks of adjacent 
blades are overlapping each other, which means that the synchronization is vital. All shafts/
pulleys are pivoted in sealed and permanent lubricated bearing boxes.

All decks are provided with a coupling to simplify the cleaning and inspection procedure. 
The decks are also provided with an manual adjusting device for the cutting height.

All decks are tested prior to delivery. 

This chapter describes repair, replacements and adjustments of stressed parts of the 
mower decks.

6.1.1 General tightening torque

Unless otherwise stated, the following tightening torque are applicable for screws and nuts 
on the machine:

Tightening torques:

Thread

Torque

M5

5 Nm

M6

9 Nm

M8

22 Nm

M10

45 Nm

Summary of Contents for Primo 2008

Page 1: ...Edition Manual Chapter Page 2005 05 04 Workshop Manual Stiga Park 1 General instructions 1 Workshop manual Primo 2008...

Page 2: ...npacking 5 1 4 2 Battery 6 1 4 3 Assembly 7 1 4 4 Final checks 9 1 4 5 General tightening torque 10 1 5 Instructions for use 10 1 6 Raising 11 1 6 1 Raising back 11 1 6 2 Raising front 11 1 7 Turning...

Page 3: ...recautions This manual has been written primarily for trained mechanics working in a well equipped workshop Nevertheless the manual contains such detailed information that it can also be of use to own...

Page 4: ...uine Spare Parts during service work 1 2 5 Lifting and blocking up Before work under the machine always make sure that lifting devices and jack stands are approved for the weight Work safe 1 2 6 Clean...

Page 5: ...The use of accessories not supplied or approved by the manufacturer Neither does the warranty cover Wearing components such as blades belts wheels battery and cables Normal wear Engine and transmissi...

Page 6: ...acking Open up the crate and release the part as follows 1 Check the air pressure in the tyres The pressure is designated on the floor mat The air pressure in the tyres is of critical importance for t...

Page 7: ...the machine as shown below 2 Place the machine outdoors or install an extraction device for the exhaust fumes 3 Start the engine according to the instructions in the user guide 4 Allow the engine to...

Page 8: ...ering column using a drift or similar so that the holes in the steering column jacket and steering column align with each other 2 Tap in the supplied tension pin from the other side using a hammer Bac...

Page 9: ...seat is equipped with a safety switch that is connected to the machine s safety system This means that certain dangerous activities are not possible when there is nobody sitting on the seat Backrest...

Page 10: ...opriate to do this check in conjunction with test driving The following items shall be checked at all machines No leakage on fuel lines and connections No mechanical damages to the electrical cables A...

Page 11: ...ews and nuts on the machine 1 5 Instructions for use Some procedures e g changing motor oil motor filter etc are refered to the instruction for use delivered with the machine The instruction of use is...

Page 12: ...sing back For certain maintenance work the rear part of the machine must be raised slightly so that the required rear wheel can be removed Raise the machine as follows 1 Position the machine on a hard...

Page 13: ...rol is highly inflammable Always store fuel in containers that are made especially for this purpose Only handle petrol outdoors and never smoke during petrol handling Never handle petrol together with...

Page 14: ...nual 1 7 6 Petrol tank Loosen the screws holding the crossbar C and remove the crossbar Loosen the screw D holding the tank and battery cage and remove the tank and battery cage with battery 1 7 7 Tur...

Page 15: ...ipments This chapter gives a brief description of the equipments and describes their repair and replacements This chapter also contains information about how to repair the plastic chassis including ma...

Page 16: ...direct into the chassis The screws used are shown in the figure to the right Threads for those screws can be repaired as follows 1 Order a repair kit for threads See the spare parts list 2 Drill out t...

Page 17: ...ll the screw B with disc 3 Tighten the screw to 40 45 Nm 2 2 1 Adjusting the drive chain U Check adjust the belt tension each season as follows Check 1 Raise the machine and remove the right hand rear...

Page 18: ...depressed halfway forward drive disengaged gear shifting can be performed Service brake not activated 3 Pedal fully depressed forward drive disengaged Service brake fully activated Also see Parking b...

Page 19: ...assis and Body 5 Step 2 Adjust the brake to act according to the description under General at the previous page The adjustment is performed at the center nut at the gearbox brake lever Turn the nut CW...

Page 20: ...ht hand rear wheel so that it can rotate freely 2 Brush the chain clean using a wire brush 3 Rotate the rear wheel by hand and at the same time spray the chain so that it is fully lubricated 4 Lower t...

Page 21: ...respective control Preferably carried out by two people Activate the controls Steering Clutch brake Raise the cutting deck Engaging the cutting deck Setting the cutting height 2 5 4 Throttle cable Lu...

Page 22: ...e machine is equipped with a mechanical steering system working with a wire This chapter contains a brief description of the function and describes repair replacements and adjustments of stressed part...

Page 23: ...ver C which affects the wheels by the rods D 3 1 2 Dismantling Note Observe how the wire is located above under rods arms etc This observation is helpful at the installation of the new wire 1 Remove t...

Page 24: ...with frame parts rods levers etc Lubricate the pulleys and mount them according to the figure See 3 1 4 Steering pulleys 3 Turn the steering wheel until the wire rivet hole in the steering roller is...

Page 25: ...the following parts Spring G Nut F To facilitate the mounting of the remaining steering pulleys screw on the nut a few turns only 6 Mount the two pulleys at the left part of the machine together with...

Page 26: ...eys Every singel steering pulley consists of the following parts A Screw B Washer C Bushing D Steering pulley E Part of the frame F Nut Assembly instructions Check the wear specially of the steering p...

Page 27: ...loaded belt tensioner This chapter gives a brief description of the belt system and describes replacements of belts and adjustments of their tensions This chapter is valid for the actual machines wher...

Page 28: ...oving the pulley 5 to stretch slacken the belt Belt C Belt C is intended to transmitt the motor power to the transmission where it is geared to a suitable ratio for the drive shaft The belt is tension...

Page 29: ...There must be a space between belt and pulley bottom The belt shall rest with its angled sides against the pulleys There must be a space between belt and pulley bottom Same demands Original belts gua...

Page 30: ...bre reinforced rubber Bending in two directions Designed to bend around pulleys in one direction only Most of the belts at the machine have tension rollers actuating from the outside of the belt This...

Page 31: ...and is intended to conduct the engine power to the gearbox The belt is controled by a lever for the clutch function Dismantle the belt as follows 1 Raise the machine by one of the alternatives below W...

Page 32: ...belt C from the pulleys 4 and 7 4 3 2 Inspection and measures 1 Check and lubricate all links The links shall move easily and not have any major play Lubricate all pivot linkages with machine oil 2 Ch...

Page 33: ...stopped by the brake pad and not by the engagement rod If the rod stops the movement the braking ca pacity can be completely lost when the parts become worn 1 Remove the rod link and press the brake...

Page 34: ...nipple is tight in its hole un normal stress will occour to the me chanical parts 4 When the adjustment is complete the fol lowing items shall be fulfilled Engage the PTO and check that the brake pad...

Page 35: ...The electrical system is also described There are also given instructions about general repair and replacement procedures 5 2 6 The motor can be started with a gear activated 6 5 2 7 The motor does no...

Page 36: ...several safety circuits Therefore actual levers and pedals are provided with micro switches The micro switches are shown in the figure below The signals from the micro switches are used to interlock...

Page 37: ...measures in each actual case When following the trouble shooting schedules it is provided that the following states are fulfilled All fuses are checked and if necessary replaced The battery shall be c...

Page 38: ...Edition Manual Chapter Page 2008 03 17 Workshop Manual Stiga Primo 5 Electrical System 4 5 2 1 The starter does not rotate...

Page 39: ...Edition Manual Chapter Page 2008 03 17 Workshop Manual Stiga Primo 5 Electrical System 5 5 2 2 The starter rotate but the motor does not start 5 2 3 The battery runs repeatedly empty...

Page 40: ...hapter Page 2008 03 17 Workshop Manual Stiga Primo 5 Electrical System 6 5 2 4 The motor does not stop 5 2 5 The motor can be started with the mover deck activated 5 2 6 The motor can be started with...

Page 41: ...Edition Manual Chapter Page 2008 03 17 Workshop Manual Stiga Primo 5 Electrical System 7 5 2 7 The motor does not stop when the operator leaves the seat and the mover deck is activated...

Page 42: ...is equipped with three kinds of connectors Fixed connectors in plastic holders Tab connectors Screw connectors All connectors shall be kept free from contamination corrosion and damp Fixed connectors...

Page 43: ...ical System 9 Screw connectors When cables shall be connected into screw connectors the cable shall be stripped off 5 mm only No metallic conductor is allowed to be exposed outside the terminal Warnin...

Page 44: ...Replacing blades 7 6 4 4 Synchronising blades 8 6 4 5 Safety 8 6 4 6 Replacing driving belt 9 6 4 7 Replacing timing belt 9 6 4 8 Replacements of pulleys and bear ing boxes 11 6 1 General 2 6 1 1 Gene...

Page 45: ...earing boxes All decks are provided with a coupling to simplify the cleaning and inspection procedure The decks are also provided with an manual adjusting device for the cutting height All decks are t...

Page 46: ...hen the top third of the grass is cut off I e 2 3 of the length of the grass remains If the grass is long and has to be cut significantly cut twice using different cutting heights Do not use the lowes...

Page 47: ...ability test a lawn mower can be subject to An iron pipe is placed right into the blades during operation The blade can be deformed but it may not under any circumstances come off or split This test v...

Page 48: ...ved from the machine 6 3 1 Disassembly Disassemble the cutting deck as follows 1 Set the highest cutting height 2 Pull out the tensioning roller H and move the belt down J at the side of the tensionin...

Page 49: ...eck from the front axes and take it out in the forward direction See the figure 6 3 2 Assembly Install the cutting deck as follows 1 Hook the deck over the front axles 2 Install the locking screws L o...

Page 50: ...a collision If the blade system has been damaged defective parts should be replaced Always use genuine spare parts Non genuine spare parts can entail a risk of injury even if they fit the machine The...

Page 51: ...e cutting deck The positive drive belt has slipped on the gear wheels Torque limiting between gear wheels and blade shaft has deployed The arrows must be opposite each other for an intact deck When to...

Page 52: ...ewing its two screws 3 Loosen the belt from the machine See previ ous sections 4 Fit the new belt and reassemble in the reverse order See also previous sections 6 3 7 Replacing timing belt To replace...

Page 53: ...rews a few turns 6 Work off the timing belt from the pulleys and fit the new one Observe the blades when fitting the new belt Correctly synchronised blades must be offset 90 from each other See the fi...

Page 54: ...necessary 10 Assemble all parts in the reverse order 6 3 8 Replacements of pulleys and bearing boxes Disassembly 1 Disassembly the drive belt and timing belt as described above 2 Disassembly the blad...

Page 55: ...sts shall the bearing box be replaced Bearing play Force the shafts radially No radial play shell exist Bearing sealings Check visually the bearing sealings All sealings shall be intact Belts Bend the...

Page 56: ...rkshop Manual Stiga Primo 6 Mower Decks 13 Assembly All parts shall be assembled in the reverse order Note the following during the assembly Lubricate all links The blades shall be orrectly synchronis...

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