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Marine Product Guides > Marine Autopilot Guides >

Raymarine Hydraulic Cylinder Ram Selection Chart

Cylinder Ram Size Chart

Use the table below to determine which Raymarine hydraulic pump is appropriately sized for your steering ram.

Important Note: The information given in this table should be used for guidance only. If you are in any doubt as to the correct drive unit contact Raymarine's Customer Support Team or consult with an authorized Raymarine dealer for further application advice.

Manufacturer and Cylinder Ram Model Number	Volume (cc)	Volume (cu in)	Raymarine Pump	Special Notes
BCS
MT50	142	8.7	Type 1	See Note 1
MT80	195	12	Type 1/Type 2	See Note 1
MType 105	261	15.9	Type 2/Type 3	See Note 1
MType 215	530	32.3	CR2	-
MType 300	750	45.8	CR2	-
MType 360	917	55.9	CR2	-
MT450	1266	77.2	-	See Note 2
MT550	1388	84.7	-	See Note 2
MT800	1984	121	-	See Note 2
MType 1160	2884	176	-	See Note 2
MType 1600	3856	235.2	-	See Note 2
HY-DRIVE
310	162	9.9	Type 1/Type 2	See Note 1
312	105	6.4	Type 1	See Note 1
313	195	11.9	Type 1/Type 2	See Note 1
314	310	18.9	Type 2/Type 3	See Note 1
316	144	8.8	Type 1	See Note 1
HYNAUTIC
K1	198	12.1	Type 1/Type 2	See Note 1
K2	288	17.6	Type 2/Type 3	See Note 1
K3	379	23.1	Type 3/CR1	See Note 1
K4	500	30.5	CR1/CR2	See Note 1
K10	123	7.5	Type 1	See Note 1
K11	180	11.8	Type 1/Type 2	See Note 1
K12	141	8.6	Type 1	See Note 1
K13	180	11	Type 1/Type2	See Note 1
K14	141	8.6	Type 1	See Note 1
K16	115	7	Type 1	See Note 1
K17	147	9	Type 1	See Note 1
K18	136	8.3	Type 1	See Note 1
K19	148	9	Type 1	See Note 1
K20	136	8.3	Type 1	See Note 1
K22	218	13.3	Type 1/Type 2	See Note 1
K24	109	6.6	Type 1	See Note 1
K25	218	13.3	Type 1/Type 2	See Note 1
K26	262	16	Type 2/Type 3	See Note 1
K27	218	13.3	Type 1/Type 2	See Note 1
K28	262	16	Type 2/Type 3	See Note 1
K29	262	16	Type 2/Type 3	See Note 1
K31	418	25.5	Type 3/CR1	See Note 1
K32	328	20	Type 2/Type 3	See Note 1
K33	377	23	Type 3/CR1	See Note 1
K51	167	10.2	Type 1/Type 2	See Note 1
KOBELT
Model 7040
B7.5	180	11	Type 1/Type 2	See Note 1
B5.5	131	8	Type 1	See Note 1
B10	239	14.6	Type 2	-
Model 7050
B7.5	333	20.3	Type 2/Type 3	See Note 1
B10	442	27	Type 3/CR1	See Note 1
B12	531	32.4	CR2	-
Model 7080
B7.5	718	43.8	CR2	-
B12	1149	70.1	CR2	-
Model 7094
U12	4326	264	-	See Note 2
U16	5768	352	-	See Note 2
U20	7210	440	-	See Note 2
U24	8652	528	-	See Note 2
U30	10815	660	-	See Note 2
Model 7096
U16	12979	729	-	See Note 2
U20	16223	990	-	See Note 2
U24	19468	1188	-	See Note 2
U30	24318	1484	-	See Note 2
U36	29185	1781	-	See Note 2
LS (POMPES)
Outboard Cylinder
28ST HB/HBR	141.6	8.64	Type 1	See Note 1
VHM228	106	6.4	Type 1	See Note 1
VHM232	112	6.8	Type 1	See Note 1
Inboard Cylinder
VHM45 DT	240	14.6	Type 2	-
VHM45.228	268	16.3	Type 2/Type3	See Note 1
VHM60 DT	505	30.8	CR2	-
VHM28 DTP	69.2	4.2	-	See Note 2
VHM32 DTP	120.5	7.35	Type 1	See Note 1
VHM40 DTP	191	11.6	Type 1/Type 2	See Note 1
VHM40.254	239	14.5	Type 2	-
VHM50 DTP	352	21.5	Type 3/CR1	See Note 1
VHM50.300	464	28.3	CR1	-
VHM60.300	664	40.5	CR2	-
VHM80 DT	1167	71.2	CR2	-
VHM90 DT	1567	95.6	-	See Note 2
VHM110 DT	3076	187.7	-	See Note 2
VHM120 DT	3798	2311.8	-	See Note 2
Double Cylinder System
VHM32 T	242	14.7	Type 2	-
VHM40 T	378	23	Type 3/CR1	See Note 1
MARCON
MC10	118	7.2	Type 1	See Note 1
MC12	152	9.3	Type 1	See Note 1
MC14	118	7.2	Type 1	See Note 1
MC16	152	9.3	Type 1	See Note 1
MC18	118	7.2	Type 1	See Note 1
MC20	152	9.3	Type 1	See Note 1
MC22	118	7.2	Type 1	See Note 1
MC24	152	9.3	Type 1	See Note 1
MC40	152	9.3	Type 1	See Note 1
MC41	152	9.3	Type 1	See Note 1
MC42	197	12	Type 1/Type 2	See Note 1
MC43	197	12	Type 1/Type 2	See Note 1
MC44	152	9.3	Type 1	See Note 1
MC46	197	12	Type 1/Type 2	See Note 1
MC60	225	13.7	Type 1/Type 2	See Note 1
MC62	288	17.6	Type 2/Type 3	See Note 1
MC64	225	13.7	Type 1/Type 2	See Note 1
MC66	288	17.6	Type 2/Type 3	See Note 1
MC50B	121	7.4	Type 1	See Note 1
MAROL
MRB-30	75	4.6	ST5	-
MRB-50	108	6.6	Type 1	See Note 1
MRB-63	154	9.4	Type 1	See Note 1
MRB-80	395	24.1	Type3/CR1	See Note 1
MORSE
HS3000 (303932)	107	6.5	Type 1	See Note 1
HS4000 (303942)	188	11.5	Type 1/Type 2	See Note 1
HS5000 (308610)	222	13.6	Type 1/Type 2	See Note 1
SEIPEM
CD101	170	10.4	Type 1/Type 2	See Note 1
S151	320	19.5	Type 2/Type 3	See Note 1
S221	440	26.8	Type 3/CR1	See Note 1
S301	530	32.3	CR2	-
S501	540	32.9	CR2	-
S701	1000	61	CR2	-
S1001	1680	102.5	-	See Note 2
S1501	2700	164.7	-	See Note 2
CV31	56	3.4	-	See Note 2
CV50	75	4.6	Type 1	-
CV51	81	4.9	Type 1	-
CV75	109	6.6	Type 1	See Note 1
CV76	118	7.2	Type 1	See Note 1
SERVI
MA40	120	7.3	Type 1	See Note 1
MA60	141	8.6	Type 1	See Note 1
MA120	294	17.9	Type 2/Type 3	See Note 1
MA200	500	30.5	CR1/CR2	See Note 1
MA300	750	45.7	CR2	See Note 1
MA500	1270	77.5	-	See Note 1
SLEIPNER
LS450	90	5.5	ST5	-
LS451	152	9.3	Type 1	See Note 1
LC452	129	7.9	Type 1	See Note 1
LC453	240	14.6	Type 2	-
LC454	268	16.3	Type 2/Type 3	See Note 1
LC455	505	30.8	CR2	-
LC456	646	39.4	CR2	-
LC457	750	45.8	CR2	-
LC458	1167	71.2	CR@	-
LC459	1567	95.6	-	See Note 2
LC460	3076	187.6	-	See Note 2
LC461	3798	231.7	-	See Note 2
SP30 (71030)	68	4.2	-	See Note 2
SP60 (71060)	125	7.6	Type 1	See Note 1
SP90 (71090)	215	13	Type 1/Type 2	See Note 1
TELEFLEX/SEASTAR
BA125-7	118	7.2	Type 1	See Note 1
BA135-7	139	8.5	Type 1	See Note 1
BA137-7	139	8.5	Type 1	See Note 1
BA150-7	167	10.2	Type 1/Type 2	See Note 1
BA175-7	216	13.2	Type 1/Type 2	See Note 1
BA200-7	310	18.9	Type 2/Type 3	See Note 1
BA200-11	486	18.9	CR1	See Note 1
Sterndrive Cylinder
125-8EM	161	9.8	Type 1/Type 2	See Note 1
BA135-8EM	155	9.4	Type 1	See Note 1
BA150-7EM	168	10.2	Type 1/Type 2	See Note 1
TENFJORD
JR1.10	100	6.1	Type 1	See Note 1
JR1.20	210	12.8	Type 1/Type 2	See Note 1
JR1.25	214	13	Type 1/Type 2	See Note 1
JR1.30	340	20.7	Type 2/Type 3	See Note 1
JR1.35	367	22.4	Type 3/CR1	See Note 1
JR1.50	565	34.5	CR2	-
JR1.60	540	32.9	CR2	-
JR1.100	1174	71.6	CR2	-
VETUS
MType 30	67	4.1	Type 1	See Note 2
MT45	152	9.3	Type 1	See Note 1
MT52	104	6.3	Type 1	See Note 1
MT65	152	9.3	Type 1	See Note 1
MT72	146	8.9	Type 1/ Type 2	See Note 1
MT80	190	11.6	Type 2/Type 3	See Note 1
MType 105	261	16	Type 2/Type 3	See Note 1
MType 110	275	16.8	Type 2/Type 3	See Note 1
MType 125	253	15.5	Type 3	-
MType 140	350	21.3	Type 3/CR1	See Note 1
MType 175	356	21.7	CR2	-
MType 215	532	32	CR1/CR2	See Note 1
MType 225	500	30.5	CR2	-
MType 340	750	45.8	CR2	-
MT450	1000	61	-
MT600	1319	80.5	-	See Note 2
MT900	1978	120.7	-	See Note 2
MType 1200	2638	161	Type 1	See Note 2
OB35	106	6.44	Type 1	See Note 1
OB85	170	10.35		See Note 1
WAGNER
N-65	98	6	ST5	-
N-85	128	7.8	Type 1	See Note 1
N40-120	127	7.7	Type 1	See Note 1
N40-190	200	12.2	Type 1/Type 2	See Note 1
N50-190	314	19.1	Type 2/Type 3	See Note 1
N50-300	495	30.2	CR1	-
N80-190	802	49	CR2	-
N80-300	1267	77.3	-	See Note 2
N-175-750	241	14.7	Type 2	-
N-175-1000	321	19.6	Type 2/Type 3	See Note 1
N-250-800	541	33	CR2	-
N-250-1000	680	41.5	CR2	-
N-250-1300	878	53.6	CR2	-
N-350-1200	1541	94	-	See Note 2
T-2	162	9.9	Type 1/Type 2	See Note 1
T-3	377	23	Type 3/CR1	See Note 1
T-4	511	31.2	CR2	-
T-5	685	41.8	CR2	-
T-10	893	54.5	CR2	-
T-11	893	54.5	CR2	-
T-12	1257	76.7	-	See Note 2
T-12B	1508	92	-	See Note 2
T-13	1257	76.7	-	See Note 2
T-13B	1508	92	-	See Note 2
WHITLOCK SQUADRON
Inboard Cylinder
SRK222	115.6	7.05	Type 1	See Note 1
SRK173	173	10.5	Type 1/Type 2	See Note 1
SRK116	222	13.47	Type 1/Type 2	See Note 1
Outboard Cylinder
SOB200	132.11	8.05	Type 1	See Note 1
SOB200	163.24	9.97	Type 1/Type 2	See Note 1
SOB168	168	10.25	Type 1/Type 2	See Note 1
Sterndrive Cylinder
SSD133(B)	132.11	8.05	Type 1	See Note 1
SSD135(UB)	132.11	8.05	Type 1	See Note 1
WILLIS-RIDLEY
T.50	136	8.3	Type 1	See Note 1
T.100	283	17.3	Type 2/Type 3	See Note 1
T.160	354	21.6	Type 3/CR1	See Note 1
W.1(1.11/16)	403	24.6	Type 3/CR1	See Note 1
W.1(1.7/8)	508	31	CR2	-
W.2(2.3/8)	800	48.8	CR2	-
W.2(2.7/8)	1171	71.4	CR2	-
W.3(75)	1706	104	-	See Note 2
W.3(85)	2181	133	-	See Note 2
W.3(95)	2722	166	-	See Note 2
R.2.5/9	543	33.13	CR2	-
R.2.5/12	724	44.18	CR2	-
R.3.25/8	927	56.5	CR2	-
R.3.25/11.25	1304	79.5	-	See Note 2
R.4/11.25	1984	121	-	See Note 2
R.5/11.5	2952	180	-	See Note 2
R.5/15.5	3968	242	-	See Note 2
2R.3.25/11.25	2608	159	-	See Note 2

Selection Chart Notes

The recommended Raymarine pump in the table above has been determined by cylinder displacement alone and should result in a nominal hardover to hardover time of 10 secs. The formula below can be used to determine the hardover time:

Hardover Time = (Ram Capacity) X 60 (Peak Flow Rate)

Note 1: Where the choice of two or more pumps are indicated the type, displacement and steering characteristics of the vessel should be considered. By choosing the larger pump with an increased flow rate a faster hardover time can be achieved, which on some vessels will result in improved Autopilot helm response and course keeping.

Note 2: The ram indicated is outside the Raymarine range of pumps.

The information given in this document should be used for guidance only, if you are in any doubt as to the correct drive unit contact Raymarine's Customer Support Team for further application advice.

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