Tag Archives: forklift parts manuals

Note: Click here to see JLG Parts Manuals

Inspecting Impco Systems for High CO Levels

Step 1: Squeeze Hose

Impco VFF30 emissions
Impco VFF30 emissions

Use a needle-nose pliers to pinch the vacuum hose on the VFF-30. If the RPM speed changes, the o-ring seal is bad. If after disconnecting the hose the engine doesn’t die or the o-ring is bad, the Impco VFF-30 needs to be replaced or rebuilt. You can also test this using carbon monoxide readings.

*If you have an electric lockoff in your lift truck, you will also have a vacuum safety or an oil pressure switch. It is against regulations for these to be disconnected (see NFPA Pamphlet 58).

Impco VFF30 exploded view
Impco VFF30 exploded view

Step 2: Prime

impco model J
primer button model J

Push the primer button while the engine is running on the Model J vaporizer-regulator. IMPCO no longer manufacturers a model J with a primer button.  However, primer buttons are available on Impco model J generic units which we offer.  The engine should stall or completely shut off while pushing the button and start back up to idle as soon as you release. If this doesn’t happen or pushing the button causes the engine to speed up, adjustments are needed with the air-fuel mixture in the mixer.  To watch how a Impco model J is rebuilt, check out this video here.  A video on how to rebuild an Impco VFF30 can be found here.

Impco CA55 carburetorStep 3: Air-Fuel Ratio Adjustments

Turn the idle mixture screw (on the mixer) counterclockwise as far as possible. The emissions reading should decrease in carbon monoxide. 


CA100 Impco carb mixture screwStep 4: Air Filter

Take out the air filter and inspect it. Replace the filter if there is an increase or decrease in emissions after the air filter is removed.

Step 5: Mixer

If you haven’t had any problems with anything in steps 1-4 and CO levels are still too high, the mixer must be replaced. Usually, you can replace your Impco Model 50 carburetor/mixer with a new Impco Model 100 or 125 with minimal adaptations. If this is not the case for you, go with a Model 55.

Step 6: Air Valve

There are 4 screws holding the Impco Model CA100/125 mixer cover that need to be removed in order to check out the air valve. (It should be part AV1-14-4; if not, replace with the correct part.) Make sure the metering cone is clean on the inside and there are no signs of wear. If you see marks implying the valve is rubbing, either sand the guide gently or replace the air valve. A lean air shim or 2 may be installed at this point if the fuel mixture still isn’t right.  Install the first shim on the metering cone lip and check the emission levels; if only a minor improvement, add the second shim.

*Clean the air valve with a solvent solution. Do not wash the diaphragm or use an abrasive cleaner on any parts. Make sure the gas valve cone is tight in the body housing.

Step 7: Power Mixture Setting

Emissions should be at an acceptable level when the truck is idling. Set the power mixture and load the mast by tilting completely back or forward. If you have a rich condition based on the exhaust analyzer, turn the power valve, or gate valve as its also known, to the “L” position.

desired emission readings_Intella Liftparts

Post by Intella Parts Company, LLC

How do you figure out what forklift part to order?

At Intella, a common question we receive is “how do I figure out what part number to order?”  Fortunately at Intella we have a huge library of forklift parts manuals from a variety of different forklift brands and models.

Forklift parts manuals
Parts and service manuals

Our parent company VanGent Forklift Parts has been in business since the late 1960s.  They’ve been collecting parts manuals for forklifts for many decades from brands such as Hyster, Yale, Toyota, Caterpillar, Komatsu, Taylor, Nissan, Komatsu, Kalmar, and most others.  Paper manuals are pretty difficult to maintain, however, so fortunately we’ve scanned all of our paper manuals to electronic copies.

If you need a part and you don’t have a part number, first you need to find the model and serial number of your forklift.  Typically a forklift will have a data tag / serial number plate somewhere near the dashboard of the forklift.  It will typically have the make, model, and serial number of the forklift stamped.

forklift serial number tag
Mitsubishi forklift serial number plate

To figure out what part number to order, we need model AND serial number.  No other information will help us like the model and serial number.  The color of the forklift really isn’t too helpful either, it’s really the model and serial number which is most helpful.

Once you provide the forklift model and serial number, it’s useful to know that there are two different types of parts manuals supplied by forklift manufacturers:

Specific forklift part number manuals:  Like the name implies, these manuals are real straight forward.  They provide pictures of assemblies, descriptions of parts, and the actual part number of the part.  Forklift manufacturers such as Cat, Hyster, Yale (modern era), Crown, Komatsu, and Nissan have parts manuals like this.

Group number forklift parts manuals:  At some point along the way, certain forklift manufacturers realized they really didn’t want end users shopping around for parts.  They’d prefer end users to simply rely on the OEM dealer and they’d like the end user to be a little in the dark.  For this reason they created group number manuals.  A group number forklift parts manual does not show unique part numbers in the manual.  The manual shows pictures, descriptions of parts, but then instead of showing a part number, it will show a group number.

A group number is simply a numerical value assigned to a particular part type.  In Clark, for example, group number 02.242 is ALWAYS an air filter element.  In each group number manual, the air filter element will show 02.242 next to it.  You’ll assume this is a part number and try to search for it…but alas, that’s only a group number and really doesn’t help–you need the serial number with it.

Clark and Toyota utilize group number manuals.  Yale Materials Handling used a system like this before they merged with Hyster.  But most Yale forklifts in the market today will not use group number manuals.

Either way, Intella Liftparts can help if you don’t have an OEM forklift part number. Simply provide us the model and serial number and we can help figure out what you need. To check out our Nissan forklift parts catalog click here.

Often customers will wonder why the exact serial number is needed when ordering parts for their forklift.  The simple answer is that often forklifts are ordered with custom options.  Take forklift radiators for example.  You can have the same model Hyster forklift, built during the same month with the same engine and one customer ordered the forklift with an open core radiator and the next customer ordered with a standard forklift radiator.  In that case, ordering by serial number would be the only way to get the right parts!

Post by Intella Parts Company, LLC