Yard-Man 430 Manuel D’Utilisation

•  Always observe safety rules when performing  

any maintenance.

•  The warranty on this lawn mower does not cover 

items that have been subjected to operator abuse 
or negligence. To receive full value from warranty, 
operator must maintain the lawn mower as  
instructed here. 

•  Changing of engine-governed speed will void  

engine warranty. 

•  All adjustments should be checked at least once 

each season. 

•  Periodically check all fasteners and make sure these 

are tight.

•  Lubricate pivot points on the blade control at least 

once a season with light oil. The blade control must 
operate freely in both directions, Figure 5-1.

•  Lubricate the wheels at least once a season with 

light oil (or motor oil). If wheels are removed for any 
reason, lubricate surface of the pivot arm and inner 
surface of the wheel with light oil, Figure 5-1.

•  Lubricate the torsion spring and pivot point on the 

rear discharge door and side mulch plug periodically 
with light oil to prevent rust, Figure 5-1.

•  Follow the accompanying engine manual for lubrica-

tion schedule and instruction for engine lubrication.

Clean underside of the mower deck after each use to 
prevent build-up of grass clippings or other debris. 
1.  Disconnect spark plug wire. Drain gasoline from lawn 

mower, or place a piece of plastic under the gas cap.

2.  Tip mower so that it rests on the housing. Keep the 

side with the air cleaner facing up. Hold mower firmly.

3.  Scrape and clean the underside of the deck with a 

suitable tool. Do not spray with water. 

4.  Put the mower back on its wheels on the ground. If 

you had put plastic under the gas cap earlier, make 
sure to remove it now.

A list of key engine maintenance jobs required for good 
performance by the mower is given below. Follow the 
accompanying engine manual for a detailed list and 
instructions.
1.  Maintain oil level as instructed in engine manual.
2.  Service air cleaner every 25 hours under normal 

conditions. Clean every few hours under extremely 
dusty conditions. Poor engine performance and 
flooding usually indicates that the air cleaner should 
be serviced. To service the air cleaner, refer to the 
engine manual.

3.  Clean spark plug and reset the gap once a season. 

Spark plug replacement is recommended at the start 
of each mowing season. Check engine manual for 
correct plug type and gap specifications.

4.  Clean engine regularly with a cloth or brush. Keep the 

cooling system (blower housing area) clean to permit 
proper air circulation. Remove all grass, dirt and 
combustible debris from muffler area.

NOTE: We do not recommend the use of a pressure 
washer or garden hose to clean your unit. These may 
cause damage to bearings or the engine. The use of 
water will result in shortened life and reduce service-
ability.

Figure 5-1: Areas of lubrication (model 435 shown)