This study proposes an analytical study in ride performance of a hydraulic cab mount system (HCMs) with the orifice and the annular orifice for a wheel loader under larger amplitude excitation of road surface roughness. First, a nonlinear dynamical model of hydraulic mount with the piecewise damping characteristic is set up to determine the vertical nonlinear force of hydraulic cab mount. And then, a half-vehicle dynamic model of a wheel loader is offered to analyze and compare the performance of hydraulic cab mount system and rubber cab mount system (RCMs) in terms of ride performance. Time domain and frequency domain acceleration responses of the vertical driver’s seat and cab pitching angle are selected as the objective functions to assess and compare HCMs performances. The study results indicate that the RMS values of acceleration responses of the vertical driver’s seat and cab pitching angle with HCMs respectively reduce by 38.16% and 29.26% in comparison with those of RCMs, and the power spectral density (PSD) value of acceleration response of the vertical driver’s seat with HCMs reduce by 55.94% in comparison with the ones of RCMs at frequency about 5Hz when vehicle moves on ISO class C road surface at the vehicle speed of 15km/h and empty load. Finally, the ride performance of HCMs in comparison with that of RCMs under various large amplitude of road surface roughness indicates that the RMS values of acceleration responses of the vertical driver’s seat and cab pitching angle respectively reduce by 30.87% and 25.70% when vehicle with full load moves on ISO class E road surface at speed of 10km/h, which improves more comfort performance under larger amplitude excitation.