GGP WBE 0701, Workshop Manual

Page: 13 / 56

Release 00 - 02/2008
Engine WBE 0701-WBE 0704
pag. 1
Service manual
4. ENGINE TUNING AND TESTING
4.1. Operating guidelines
The engine requires a series of interventions (shown in the table below) in order to ensure minimum basic
maintenance.
Operation First 5 hours
Every 5 hours
or daily
Every 25
hours or
every season
Every 50
hours or
every season
Every 100
hours
Check oil level
- ■ - - -
Change oil *
(1)
■ - - ■ -
Clean muffler and engine
- ■ - - -
Check air cleaner *
(2)
- ■ - - -
Replace air cleaner *
(2)
- - ■ - -
Check spark plug
- ■ - - -
Replace spark plug
- - - ■ -
*
(1)
Replace the oil every 25 hours if the engine is working at full load or at high temperatures.
*
(2)
Clean the air filter more often if the machine is working in dusty areas.
For the operations that are not difficult for the final
user the assistance centre must maintain the mo-
tor in perfect efficiency, in accordance with two
intervention lines:
- Tuning the engine whenever possible.
- Recommending the client a routine maintenan-
ce program at set intervals (e.g. at the end of the
season or before a long period of inactivity).
4.2. Engine tuning program
As part of general engine tuning or any intervention
on the lawn tractor, it is recommended that the Ser-
vice Centre performs a series of operations aimed
at maintaining the engine’s efficiency.
Tuning should involve:
- external blowing and cleaning the cylinder
head, cylinder and muffler by removing any
remains of grass and mud;
- checking the oil level, topping up or replacing
parts if necessary;
- inspecting the condition of the starter rope and
checking that it functions correctly [ 6.2] ;
- cleaning and oiling the air filter [ 5.1] ;
- emptying and cleaning the fuel tank and che-
cking the breather pipe [ 5.2] ;
- adjusting minimum and maximum speeds [
8.1 and 8.] ;
- inspecting the condition of the spark plug; che-
cking the distance between the electrodes [
10.1] ;
- tightening the screws [ 11.2] ;
- functional test [ 4.] .
Should the checks and adjustments fail to achieve
a satisfactory result, refer to chapter [ 15] for
troubleshooting.
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