1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215 
JJJQJ
Page 202
If you've noticed an error in this article please click here to report it so we can fix it.
SEVEN basic right-hand drive models comprise the Leyland Marathon range. Five are tractive unit variations and two drawbar models.
Smallest of the tractive units is the 2.97m (9ft 9in) wheelbase vehicle, which is available with three engine options. With the Leyland TL12 power unit the Marathon short-wheelbase version is plated for 38 tonnes (37.4 tons) gcw while with the optional Rolls-Royce 220 or Cummins 250 the gcw is 34.5 tonnes (34 tons).
The turbocharged TL12 produces a net installed output of 204kW (273bhp) and has a capacity of 12.47 litres (761 cu in). Maximum net torque is 1,055Nm (780Ibft) at 1,300 rpm.
If the Rolls-Royce option is chosen the operator has an available 156kW (209bhp) at 2,100rpm from the Eagle 220 which has a ram-tuned induction system. The Cummins NHC 250, which is the third option, has a capacity of 14 litres (855 cu in) and produces 170kW (228bhp) net at 2,100rpm.
A Lipe Rollway twin-plate clutch is fitted to all Marathons and it incorporates a clutch brake. countershaft rangechange gearboxes are matched to all engine options.
There are four types of rear axle suitable for varying operating requirements. On the TL12-engined models a Leyland heavy-duty hub-reduction axle is employed.
For the smaller Cummins 250 and Rolls-Royce 220 engined vehicles a Guy-produced hip-reduction unit is used.
Finally, tandem Maudslay Rockwell medium-hub-reduction rear axles with a lockable third differential are fitted to the 6 x 4 units. A cross-lock differential is available as an optional extra. A short sleeper-cab is not available on the smallest wheelbase option. However, it can be specified for the 3.12m (1 Oft 3in) model, but only with a TL12 power unit. The short sleeper-cab is equipped with a 600m (23.6in) wide bunk as standard, but a second upper bunk is available as an extra.
Like the shorter wheelbase Marathon, the 3.12m (1 Oft 3in) wheelbase sleeper-cab model is plated for 38 tonnes. For those operators requiring Marathon with a gcw of 44 tonnes (43.3 tons) the 6 x 4 4.01m (13ft 2in) wheelbase day cab tractive unit is available. This too is fitted with the TL12 power unit.
Two drawbar units with gtws of 38 tonnes (37.4 tons) are available with wheelbases of 4.88m (16ft) and 5.5m (18ft). Day cabs are fitted to each and they each use the TL12 engine.