QUANZHOU JUNDE MACHINERY CO.,LTD
Hydraulic Cylinder manufacturer
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Komatsu hydraulic cylinder
Part no.
4433371
4484270
4439903
4619953
4433373
EX3600-5 -6 Boom, arm or bucket hydraulic cylinder
Our warranty policy:
1 Complete Hydraulic Cylinder Rebuild – Guaranteed for 3000 workmanship hours or 6 months, whichever comes first.
2 Any exchanged component or new cylinder –
Guaranteed for 5000 hours or 1 year, whichever comes first.
3 Claims must be submitted within 30 days of failure, or they will be subject to rejection.
we will test every cylinders before sending out :
any failure below will be find out :
1) excessive vibration
2) high fluid temperature
3) control loss
4) noisy
5) leakage
6) low pressure
7) unoperative
8) over heat
we use high quality raw materials as below :
rod eye---CK45
rod shaft---AISI 4140 55-60 HRC induction and chrome
barrel eye---ck45
flange---st52
tube---st52 roughness ra0.25
piston---AISI4140
gland-----AISI 4140
cushion sleeve---AISI4140
lock nut----AISI4140
we control every processure of production very strictly.
for example : rod as quality control :
check the rod visually :
check for damages, cracks, and scratches on the chrome surface.