J&M 220 Operating And Maintenance Manual - page 5

MODEL 220 

HYDRAULIC 

IMPACT HAMMER 

J&M, LLC. 

STANDARD WARRANTY 

J&M, Foundation Equipment, LLC. (J&M) warrants new products sold by it to be free from 

defects in material and workmanship for a period of 90 days after date of delivery to the first 

user and subject to the following conditions: J&M’s obligation and liability under this warranty is 

expressly limited to repairing or replacing, at J&M's option, any parts which appear to J&M 

upon inspection to have been defective in material or workmanship.  Such parts shall be 

provided at no cost to the user at the business establishment of J&M or at the J&M distributor 

of the product during regular working hours. 

This warranty shall not apply to component parts or accessories of products not manufactured 

by J&M and which carry the warranty of the manufacturer thereof or to normal maintenance 

parts (such as filters). 

Replacement or repair parts installed in the product covered by this warranty are warranted 

only for the remainder of the warranty as if such parts were original components of said 

product.  

J&M's obligation under this warranty shall not include any transportation charges, costs of 

installation, duty, taxes or any other charges whatsoever, or any liability for direct, indirect, 

incidental, or consequential damage or delay. 

If requested by J&M, products or parts for which a warranty claim is made are to be returned 

transportation prepaid to J&M. 

Any improper use, including operation after discovery of defective or worn parts, operation 

beyond rated capacity, substitution of parts not approved by J&M or any alteration or repair by 

others in such manner as is J&M's judgment affects the product materially and adversely shall 

void the warranty. 

For impact pile hammers, driving in excess of 10 blows per inch (set of 0.1 inch per blow) is 

considered practical refusal.  Driving in excess of 10 blows per inch for more than 6 inches of 

driving or driving in excess of 20 blows per inch at all is considered improper use and will void 

the hammer warranty. 

For vibratory drivers, driving when penetration is less than 1" per minute is considered practical 

refusal.  Driving when penetration is less than 1" per minute for more then 5 minutes of driving 

or driving at all when penetration is less than 1" per minute and amplitude is greater than 

1" (vibrator and pile are bouncing) is considered improper use and will void the vibrator 

warranty. 

J&M makes no other warranty, expressed or implied, and makes no warranty of 

merchantability or fitness for any particular purpose. 

No employee or representative is authorized to change this warranty unless such change is 

made in writing and signed by an officer of J&M.