Description

Komatsu PC340LCD, NLCD-7K Parts Catalog – 180 Pages of Factory Numbers

You’ve got a Komatsu PC340LCD, NLCD-7K Parts Catalog on your bench because the aftermarket parts list you pulled last week had the wrong swing motor seal. Cost you half a shift and a phone call to the dealer. That’s why this 180-page factory catalog exists. Every part number in here was printed by Komatsu for the PC340LCD and NLCD-7K high reach demolition machine, serial number K40575 and up. No third-party re-draws. No “equivalent” numbers. Just the OEM list.

Electrical System: Tilt Cab Main Harness Breakdown

Page 6 starts the Tilt Cab Main Harness section – harness, clips, clamps. If you’re tracking down an intermittent short in the cab tilt circuit, you need the exact clip part number. Aftermarket catalogs will show you a generic harness clip. This catalog gives you the Komatsu number for the clip, the harness, and the clamp. Three different illustrations for three different harness routing variations. Page 10 shows the clamp routing for the NLCD-7K. If you’re working on a machine built after K40575, that’s your page.

Main/Revolving Frame and Tilt Frame Assembly

Starting on page 14, the Main/Revolving Frame section covers the tilt cab frame, tilt cylinder pins, lubrication piping, and proximity switch mounting. The proximity switch on page 24 is a common failure point on these machines. If you don’t have the factory part number, you’ll get the wrong switch and the cab won’t know it’s tilted. That’s a safety hazard. This catalog lists the switch, the bracket, and the bolts. Torque specs? Not in a parts catalog – this is for part numbers only. But you’ll find the correct bolt grade and length on page 24 so you can order the right one.

Operator’s Compartment: Window, Door Lock, Wiper, Control Panel

Pages 28 through 50 cover the operator’s cab in detail. Front window, roof window, door lock, open lock, accessories, blind bolts, roof wiper, roof wiper hose, control panel, OPG guard, and window washer tank. If you need a replacement roof wiper hose for the NLCD-7K high reach demolition machine, page 44 has the hose part number and the routing diagram. Don’t order a generic hose – they kink at the cab joint. Factory hose has the right bend radius.

Komatsu PC340LCD, NLCD-7K Parts Catalog: What Makes It Different

Every OEM parts catalog I’ve used from Komatsu follows the same logic: exploded view with reference numbers, then a table with part number, description, quantity per machine. This one is no different. But the value is in the serial number range. K40575 and up. If your machine is older, you need a different catalog. This one covers the production run that includes the tilt cab proximity switch update and the revised lubrication piping. FAI Komatsu 67-80DT Parts Catalog – OEM Hydraulic Steering Piston List is a different machine line – don’t mix them up. For other Komatsu models, see Komatsu WH609-1 WH613-1 Parts Catalog | 347 Pages OEM or Komatsu PC14R Parts Catalog – Order Correct Parts Fast.

Why a Factory Parts Catalog Over Aftermarket?

I’ve seen aftermarket parts catalogs that claim to cover the PC340LCD but use a generic illustration for the revolving frame. That gets you the wrong pin for the tilt cylinder. OEM diagrams are machine-specific. The difference between a 20-cent washer and a $200 cylinder repair is one wrong part number. When you’re ordering for a high reach demolition machine, the pins and bushings see extreme loads. You don’t guess. You use the factory catalog. For background on diesel engine basics that power these machines, check this Wikipedia article on diesel engines – but for part numbers, stick with Komatsu’s own document. Or visit this Wikipedia article on diesel engines for general knowledge.

180 Pages – No Fluff, Just Part Numbers

Every page from 1 to 180 is a parts list or illustration. There are no procedures, no torque specs, no wiring diagrams beyond harness routing. That’s not what a parts catalog does. It gives you the number so you can order the piece and get the machine back to work. If you need repair procedures, buy the service manual. If you need the part number, this is it.

FAQ

Does this catalog cover the NLCD-7K high reach demolition attachment?

Yes. The title includes both PC340LCD and NLCD-7K. The contents list the tilt cab, revolving frame, and operator’s compartment specific to the demolition configuration.

Will this work for a machine with serial number lower than K40575?

No.

I need a part number for the tilt cylinder pin. Which page do I look at?

Page 16 covers the tilt cylinder and pins under the Tilt Frame section. The exploded view shows the pin, retaining bolts, and washers. The parts table lists the Komatsu part number, quantity, and description. Use that number when ordering – do not substitute with a generic pin because the bore diameter and length are specific to the PC340LCD tilt cab geometry. If you order the wrong pin, the cylinder will bind or the cab won’t tilt fully, creating a safety hazard during transport. I’ve seen a shop try to “make one fit” – cost them a cracked cylinder mounting ear. Don’t be that shop.

Are there wiring diagrams in this parts catalog?

No. This is a parts catalog, not a service manual. It shows harness routing and clip locations for the tilt cab main harness, but no electrical schematics or pinouts. For wiring diagrams, get the factory service manual.

If you’re ordering parts for a Komatsu PC340LCD or NLCD-7K high reach demolition machine, stop using aftermarket lists that cost you time and money. Access the Factory Manual – 180 pages of OEM part numbers, verified for serial number K40575 and up. Get the right part the first time.