You can use any pump thats >3000 psi. That one might be a trick since it looks like the inlet isn't threaded. This one might be better, one person is trying it:
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200333147_200333147

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87 Mercedes 300TD, 81 300D, 95 Dodge Cummins 4x4