Building my own PE250x400 Tracked Jaw Crusher Build – Need Advice on Hydraulic Drive vs Separate Diesel & Yanmar Engine Options

I've recently bought an old Morooka YFW40R tracked carrier and a Chinese PE250x400 jaw crusher, with the plan of building my own small tracked crusher. The Morooka came with a Yanmar 4T95L-FW, but unfortunately the engine has had water sitting in it and is currently seized. I'm trying to decide which direction to go from here and thought some of you guys might have experience with these older machines. Firstly, does anyone know a good source for parts or rebuild kits for the Yanmar 4T95L-FW? I've been struggling to find much for this particular engine. Alternatively, does anyone know of a reasonably common replacement engine that will suit the SAE 4 bellhousing setup without having to completely reinvent everything? I'm also trying to decide whether to run the crusher from the Morooka's hydraulic system, or fit a small additional diesel engine dedicated to driving the crusher. I'd be interested to hear the pros and cons of each setup from anyone who's done something similar. If I go hydraulic, I'd also be interested to know what sort of hydraulic motor/pump setups people have used for jaw crushers of this size, what pressure and flow you're running, and how well hydraulic drive handles the shock loading from the crusher. I'm documenting the whole project as I go. This first video shows what I've started with and what I'm planning: Any advice on the Yanmar, suitable replacement engines, or the best way to drive the crusher would be appreciated.

Did you ask the manufacturer of the crusher how much power the crusher needs to operate? How much rpm? With information you can calculate backwards if the hydraulic power of the Motorola is sufficient.

If I were in your shoes I would try to stick as much as possible with prefabricated solutions as possible. I did an engine swap a few years ago and building from scratch costs time and money. This thread gives a little insight, it's about a forklift but the thoughts behind it are almost the same https://www.heavyequipmentforums.com/threads/toyota-fd-150-forklift-engine-swap.125097/#post-1390631

JRK said: Did you ask the manufacturer of the crusher how much power the crusher needs to operate? How much rpm? With information you can calculate backwards if the hydraulic power of the Motorola is sufficient. Click to expand... Needs 15kw to run the crusher. Rpm needs to be approximately 300 rpm has a 800mm flywheel pulley on the crusher. Yanmar engine is 64hp so has the power but im not sure how to spec pumps and motors yet. Need to do more research. There are 2 gear pumps unused on the marooka that were for the lift cylinder but with no part number im not sure the specs on them.. how worried should I be about oil heat?

Does it make sense to have an overload clutch before the crusher in case some material blocks it?

300rpm for which shaft? The flywheel or the drive shaft of the drive motor?

JRK said: Does it make sense to have an overload clutch before the crusher in case some material blocks it? Click to expand... I guessed thats what the belts were for bust could add an extra bit of security.

JRK said: 300rpm for which shaft? The flywheel or the drive shaft of the drive motor? Click to expand... Flywheel

Do you some numbers or typeplates on the pumps? Post the serial number of the machine maybe somebody can provide a manual

There are numbers on the pumps but can't match them to anything I'll attach them here. And all the cab and everything was removed from the marooka frame so I dont have a serial number but it is a YFW40R.

Ok I thought just the engine has to be replaced. Do you have the parts for operating the drivetrain ? I would think about getting the Mooroka running first. Pumps : look for pump shops supplying Japanese pumps if you can make any sense of the numbers Cooling: I assume the engineers at mooroka did the work already for you . At least when you use the main pumps

I try to find the pump manufacturer of my Toyotas in the afternoon maybe it is easier to Google with a name and rhe numbers. I assume the number with the letters is the type

JRK said: Ok I thought just the engine has to be replaced. Do you have the parts for operating the drivetrain ? I would think about getting the Mooroka running first. Pumps : look for pump shops supplying Japanese pumps if you can make any sense of the numbers Cooling: I assume the engineers at mooroka did the work already for you . At least when you use the main pumps Click to expand... Engine hasn't been replaced yet just looking to rebuild the one I have just need to find the rebuild parts. Cooling i mean using a pump to running the crusher will generate more heat then the tip cylinder would ever use so my thought is the stock morroka cooling system may not be sufficient?

The Hydraulic drive train has the same load when you think of going uphill full loaded 8 hours a day imho

JRK said: The Hydraulic drive train has the same load when you think of going uphill full loaded 8 hours a day imho Click to expand... That is true

I didn't fully get it. Do you have the control lever for forward and reverse from the cabin?do you have all the electronics to control the hydraulics ? Probably this is harder to get than a used yanmar engine or parts for the engine

JRK said: I didn't fully get it. Do you have the control lever for forward and reverse from the cabin?do you have all the electronics to control the hydraulics ? Probably this is harder to get than a used yanmar engine or parts for the engine Click to expand... Its an older machine with large pumps with internal valuing using linkage so no electricrontic hydraulics are all manual. Not much left of the machine but enough to use it. Have a quick look through my video you will see.

Ok so you think you get it working once the engine is working ?

JRK said: Ok so you think you get it working once the engine is working ? Click to expand... Yes the rest all looks ok

Ok when you stick with Hydraulic motor you have to think about an similar application for example a concrete mixer drive motor from a truck. Try to get spec and check if it fits to the main or auxiliary pump.