About this product
📘 Overview
Komatsu dozer door glass replacement — left Hand Door Glass — the Komatsu replacement for OEM 12Y-978-3930. It covers 3 published Komatsu models, listed in full further down this page. The pane installs into the original cab frame using the factory glazing seal and retaining hardware, so no cab modification is required. Sold as a komatsu dozer door glass replacement and listed as a komatsu dozer door glass replacement, it is matched to the OEM number rather than offered as a universal fit.
⚙ Key Features of the Komatsu Dozer Left Hand Door Glass (OEM 12Y-978-3930)
- Direct interchange with OEM 12Y-978-3930 — same mounting points and same fit as the original Komatsu part
- One part number across 3 models spanning Komatsu dozers — one spare covers a mixed fleet
- Packed for crate — the shipping method Depco specifies for this part
- A true dozer left hand door glass — the komatsu left hand door glass is dimensioned from the original Komatsu part, not adapted from a similar one
🔑 Why Fit the OEM 12Y-978-3930 Left Hand Door Glass Replacement
- Restores the original sightline — cracked cab glass is a visibility and pre-start inspection failure, not a cosmetic problem
- Aftermarket pricing against a dealer pane with the identical cut and the identical mounting method
- Ordering a komatsu dozer by OEM number removes the guesswork — the left hand door glass replacement fitment on this page is published, not inferred
📊 Komatsu dozer door glass replacement Specifications — OEM 12Y-978-3930
Specification Value OEM part number 12Y-978-3930 Depco part number D12Y-978-3930 Part type Left Hand Door Glass Glass Length 28.5" Box Glass Width 16" Glass Height 56.5" Machine class Dozer Models covered 3 Installation Original cab frame, factory glazing seal Shipping method CRATE🚜 Which Komatsu Models Take the OEM 12Y-978-3930 Left Hand Door Glass?
This is a machine-specific replacement part matched to OEM 12Y-978-3930, not a universal fit. Fitment follows the published model list below:
Machine group Models Komatsu dozers D12Y, 978, 1362Check your model against the table above, and confirm your serial-number range before you order. If your model is not listed, email support@eskidsteer.com or message us on chat with the machine model and serial number. Everything needed to confirm fitment is on this page — add it to your cart to check delivered pricing for your address.
🔗 Parts Often Bought With the 12Y-978-3930 Left Hand Door Glass
Related komatsu stock on eskidsteer.com — each shares a side, a kit, or a machine list with this left hand door glass:
Part OEM number Why it is listed here Komatsu Dozer Right-Hand Door Glass for 12Y-978-3940 OEM 12Y-978-3940 the opposite-hand part Komatsu Dozer Right-Hand Door Glass OEM 12Y-978-1372 the opposite-hand partCheck the glass before the driver leaves: any breakage must be written on the delivery receipt at the moment of delivery. A Bill of Lading signed clean closes the carrier claim window for good.
❓ OEM 12Y-978-3930 Left Hand Door Glass Questions, Answered
Is this an exact replacement for Komatsu OEM 12Y-978-3930?
Yes. The Depco D12Y-978-3930 is a direct interchange for OEM 12Y-978-3930 and fits the original mounting position without modification.
Will the 12Y-978-3930 part fit a D12Y and a 1362?
Yes. Both the D12Y and the 1362 are on the published fitment list for OEM 12Y-978-3930, along with 1 other models shown in the compatibility table on this page.
Do I need new seals to fit the 12Y-978-3930 glass?
Not normally. The factory seal is reused, and a replacement glazing strip is only called for if the original has perished.
How does the Komatsu Left Hand Door Glass ship?
Komatsu Dozer Left Hand Door Glass travels on a pallet by LTL freight. Your shipping cost is worked out at checkout from the delivery address, with lift gate available as an option.
Description supplied by eSkidSteer through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.
