Husqvarna PG820 - Manual (Page 22)

24 - English
Spring Steel Heads
The below diagrams illustrate the main parts comprising
this type of grinding head.
Diagram 1
1. Spring steel spring
2. Head plate
3. Cushion ring
4. Head mate
Diagram 2
1. Spring steel springs
2. Bolts
3. Silicone spring
4. Head mate
5. Cushion ring
6. Head buddy
7. Spacers
8. Head plate
Between the head plate and head mate are a series of
white silicone springs, spacers and the spring steel spring
which give shock absorption and fl exibility in the system.
Unlike with the conventional/demolition heads, the spring
steel heads are able to move in a fl exible manner without
any moving parts due to the presence of the spring steel
spring.
Over an extended period of time the spring steel spring
fatigues and the spring steel “fi ngers” begin to break
off. This creates irregular movement within the grinding
heads and will cause vibration when the machine is in
operation.
Routine checks for broken “fi ngers” in the spring steel
grinding heads are recommended. Life expectancy
for grinding heads can vary between 6 and 12 months
depending on the amount of usage.
Replacement spring steel springs are available and can
be replaced without throwing the grinding head away.
The spring steel heads can also be made less fl exible
by the addition of a second spring steel spring.
Maintenance
Diagram 1. Spring Steel Head
2.
1.
3.
4.
Diagram 2
2.
1.
3. 4. 5. 6.
7. 8.