Deutz WP6C/WP4C Series Marine Diesel Engine User Service Guide
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(2) Three Guarantee Period
For end engine products manufactured by Weichai, their Three guarantees service and
warranty period starts from the actual date of sales and Weichai sales invoices and warranty
cards or sales invoices from distributors can be taken as the evidence (The Three guarantee
period for marine main engine starts from the actual testing and adjusting date of the engine).
For that of matching engines for the other products, the agreement between two parties
prevails; If there are specific specifications for the engine three guarantees issued by the main
engine manufacturer, these specifications prevail
．
The attached warranty card is regarded as
the evidence for the executive standard. If there is no specific standard for the three
guarantees service of the engine or detailed contents are unknown, Weichai standards prevail.
Three guarantees service and the start date would depend on the actual sales date of the
matching products and relevant sales invoice and warranty card are taken as the evidence.
For original quality problems in spare parts purchased from Weichai, the three guarantee
period for assembly parts is 3 months, for basic parts, it is 1 year. In the case of wear parts,
rubber parts, piston rings, oil seals, bearing bushes, bolts, fuel injector couplings etc are not
included in the scope of three guarantees after their installation. If there are quality problems
of basic parts in the three guarantee period, the three guarantees service will be billed
according to work hours after the site confirmation from the dispatched man in the center
service and preservation of effective photographs. For three guarantee period of spare parts,
the sales invoice date of center warehouse or special service center prevails. Assembling
quality problems are not included in the scope of Weichai’s three guarantees but it should be
the assembling entity which undertakes the three guarantees
．
4. Regulations about Non-“Three Guarantee” Items:
Diesel engine faults due to improper usage, maintenance and matching; Damages occur
during loading and unloading of transport after purchasing; Operating conditions exceed the
scope specified in the product manual; improper matching and overspeed and overload
application etc; Running-in and maintenance which are not implemented according to
product manual; Application of oil/fuel, antifreeze and filters etc which are in poor quality
and do not comply with relevant specifications.
Faults due to modification, adjustment and disassembling of parts which are not allowed to
be modified, adjusted and disassembled.
Oil, antifreeze, filtering elements, hoses, belts and fuel injector couplings etc which are
applied to normal use, consumption and maintenance.
Absence of three guarantees evidences like warranty card and relevant invoice etc and the
user fails to prove the purchased product is still in the valid three guarantee period. The
product specification and model on the evidence or invoice do not comply with those
included in the three guarantees or such specification and model have been altered.
The user fails to remain the original status after fault occurrence but implements
troubleshooting at will and it is impossible to implement technical appraisals for the detection
of fault causes.
Faults caused by misoperation.
Damages result from force majeure like wars and natural disasters etc.
Diesel engine damages due to traffic accidents.
