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Caterpillar M323F Railroad Wheeled Excavator

Maker:  Diecast Masters
Model No:  85661
Scale:  1:50
Review Date:  December 2020

Diecast Masters Index
Rail Mounted Equipment Index

Cranes Etc Model Rating
Packaging   (max 10) 9
Detail   (max 30) 25
Features   (max 20) 18
Quality   (max 25) 20
Price   (max 15) 12
Overall   (max 100) 84%


Caterpillar M323F Railroad Wheeled Excavator Video  [Youku video]
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Caterpillar branded tin.
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On the rails.
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Metal rail wheel.
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Tamper tool.
Opening doors.
Opening panel.

The Caterpillar M323F Railroad Wheeled Excavator weighs around 23 tonnes.

It is designed for use in a railway environment, and it can traverse along railway lines.


The model comes in the usual excellent packaging.  There is an outer shipping carton which contains a tin which is protected by a nylon bag.  The tin is high quality and includes pictures and details about the real machine.

The review model had no missing parts or defects.

A mini catalogue of the Diecast Masters range is included.  Instruction sheets describe the fitting of the mirrors, the operator, the included work tools, and the opening doors.  Two simple tools are included.

A number of work lights have to be fitted.


A plastic track section is included which provides a display setting for the model in rail mode.  It would have looked better with a rougher surface to represent track ballast.

The undercarriage is metal with plastic side protection bars, and there are lights at each end.  The road wheels are detailed.  The rail wheels are metal and nicely modelled, and there is a support bar for use by a grab when travelling.

The cab is plastic with a plastic mirror, beacon light and air horns.  There is a windscreen wiper and lights are modelled also. Inside the detail is very good with Cat on the seat back.  A standard operator figure is supplied. 

The body casting has indented panels and the Cat graphics are very sharp with the rear lights painted. A side grille is modelled as a clear plastic part with a grille pattern printed on, and it looks reasonable.  Detailing on top is very good with highlighted parts. 

The two piece boom and stick connections are made by painted rivets and they enhance the look of the model.   The hydraulic hose detailing is very good with soft hoses and connectors are detailed.  The quick connector at the end of the stick is plastic.

Three work tools are provided. The digging bucket is a simple metal part.  A picker for railway sleepers (ties) is metal as is the tamper frame.  Tiny graphics add detail.


The road wheels roll well and the steering axle achieves a reasonable angle.

The rail bogies can be raised and lowered, and the model moves well on the track section.

The cab door opens as does the door to the passenger compartment.  A side panel also opens to gives access to engine parts.

The model rotates well.

The boom, stick and movement of the quick connector have a good range of movement.  The model is stable on the rails with the boom and stick at maximum extension over the side.

The three tools give a variety of display options.  They clip on to the connector easily.  The grab rotates and has opening jaws.


This is a well made model with plastic used appropriately.

The paint is very good and the graphics are sharp.


It is good value.


This is an excellent road rail excavator model which has the usual high standard of presentation.  It is very functional with nice details.  It would probably be suitable on an O Gauge railway layout.


The model became available in December 2020.

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The parts out of the box.
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Nice body shape.
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Detailed cab with operator.
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Nice hydraulic hoses.
Profile view.
Good detail on top.