WC-42S Concrete Mixer Troubleshooting Engine

WC-42S CONCRETE MIXER — TROUBLESHOOTING (ENGINE)

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, please take a remedial action following the

diagnosis based on the Troubleshooting (Tables 9 and 10) information shown below and on the next page. If the problem cannot be remedied, please leave the unit just as it is and consult our company's business office or service plant.

TABLE 9. ENGINE TROUBLESHOOTING

SYMPTOM	POSSIBLE PROBLEM	SOLUTION

Difficult to start

	Ignition plug being bridge?	Check ignition system.

Fuel is available but spark plug	Carbon deposit at ignition?	Clean or replace ignition.
Fuel is available but spark plug
will not ignite. (Power available at	Short circuit due to defective	Replace insulators.
high tension cable).	Short circuit due to defective	Replace insulators.
high tension cable).	insulators?
	insulators?

	Improper spark gap?	Set spark plug gap to the correct gap.

Fuel is available but spark plug	Short circuit at stop switch?	Check stop switch circuit. Replace stop switch if defective.
will not ignite. (Power NOT
will not ignite. (Power NOT
available at high tension cable).	Ignition coil defective?	Replace ignition coil.

	Muffler clogged with carbon	Clean or replace muffler.
	deposits?
Fuel is available and spark plug
Fuel is available and spark plug	Fuel in use inadequate (water,	Flush fuel sytem and replace with fresh fuel.
ignites (compression normal).	Fuel in use inadequate (water,	Flush fuel sytem and replace with fresh fuel.
ignites (compression normal).	dust)?
	dust)?

	Air Cleaner clogged?	Clean or replace air cleaner.

	Defective cylinder head gasket?	Tighten cylinder head bolts or replace head gasket.
Fuel is available and spark plug
Fuel is available and spark plug	Cylinder worn?	Replace cylinder.
ignites (compression low ).	Cylinder worn?	Replace cylinder.
ignites (compression low ).
	Spark plug loose?	Tighen spark plug.

Operation not satisfactory

	Air cleaner clogged?

Not enough power available	Air in fuel line?	Bleed (remove air) from fuel line.
Not enough power available
(compression normal, no miss-	Fuel level in carbureator float
firing).	Fuel level in carbureator float	Adjust carbureator float
firing).	chamber improper?	Adjust carbureator float
	chamber improper?

	Carbon deposits in cylinder?	Clean or replace cylinder

	Ignition coil defective?	Flush fuel sytem and replace with fresh fuel.
Not enough power available
Not enough power available	Ignition plug often shorts?	Replace ignition wires, clean ignition.
(compression normal, miss-	Ignition plug often shorts?	Replace ignition wires, clean ignition.
(compression normal, miss-
firing).	Fuel in use inadequate (water,	Flush fuel sytem and replace with fresh fuel.
	Fuel in use inadequate (water,	Flush fuel sytem and replace with fresh fuel.
	dust)?

	Excessive carbon depostion in	Clean or replace crankcase.
	combustion chamber?

Engine overheats.	Exhaust or muffler clogged with	Clean or replace muffler.
	carbon.

	Spark plug heat value incorrect?	Replace spark plug with correct type spark plug.

PAGE 30 — WC-42S CONCRETE MIXERS — PARTS & OPERATION MANUAL — REV. #8 (12/16/05)

WC-42S specifications

The Multiquip WC-42S is a versatile and robust walk-behind concrete saw, specifically designed for precision cutting and user efficiency. This machine is particularly beneficial to contractors involved in the construction and maintenance of roads, pavements, and other concrete structures. Its durability and high-performance specifications make it a popular choice for both commercial and residential projects.

One of the standout features of the WC-42S is its powerful engine. Powered by a reliable Honda GX390 engine, the saw offers impressive performance, delivering ample power for both wet and dry cutting applications. The engine's fuel efficiency ensures longer operational periods, minimizing downtime for refueling, and its ease of use is a significant advantage for operators of all skill levels.

The WC-42S is equipped with a robust cutting assembly that accommodates a variety of blade sizes, with a maximum cutting depth of up to 4 inches. This adaptability allows users to customize their operations according to specific project requirements. The machine can support blades up to 14 inches in diameter, offering added versatility for various cutting tasks across different materials, including asphalt and reinforced concrete.

A notable technological feature of the WC-42S is its inflexible frame design, which enhances stability and support, ensuring straight cuts even under demanding conditions. The saw also features a user-friendly depth adjustment system that allows for quick changes between cutting depths, providing operators with unparalleled control.

Safety and comfort have also been prioritized in the design of the WC-42S. It is fitted with ergonomic handles that reduce operator fatigue during prolonged use. The saw’s low-profile design allows for better visibility and control, particularly when cutting in tight spaces or intricate patterns.

Moreover, the WC-42S includes an integrated water system for cooling the blade and minimizing dust, contributing to cleaner worksite conditions. This feature not only enhances performance but also improves operator safety by reducing silica dust exposure.

In summary, the Multiquip WC-42S walk-behind concrete saw stands out with its powerful engine, versatile cutting capabilities, user-friendly design, and integrated safety features. Its blend of technology and robust engineering makes it a favorite among professionals looking for reliability and high performance in concrete cutting solutions. With the WC-42S, contractors can achieve precise cuts efficiently and effectively, making it a worthy investment for any concrete project.